Weakness (CWE)
CWE-770: Allocation of Resources Without Limits or Throttling
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
How to prevent it (8 mitigations)
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Requirements
Clearly specify the minimum and maximum expectations for capabilities, and dictate which behaviors are acceptable when resource allocation reaches limits.
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Architecture and Design
Limit the amount of resources that are accessible to unprivileged users. Set per-user limits for resources. Allow the system administrator to define these limits. Be careful to avoid CWE-410.
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Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place, and it will help the administrator to identify who is committing the abuse. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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Architecture and Design
Mitigation of resource exhaustion attacks requires that the target system either:
- recognizes the attack and denies that user further access for a given amount of time, typically by using increasing time delays
- uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution can be difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply requires more resources on the part of the attacker.
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Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
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Architecture and Design, Implementation
If the program must fail, ensure that it fails gracefully (fails closed). There may be a temptation to simply let the program fail poorly in cases such as low memory conditions, but an attacker may be able to assert control before the software has fully exited. Alternately, an uncontrolled failure could cause cascading problems with other downstream components; for example, the program could send a signal to a downstream process so the process immediately knows that a problem has occurred and has a better chance of recovery.
Ensure that all failures in resource allocation place the system into a safe posture.
Source: MITRE CWE-770
2,488 results · Feed
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Medium 4.6
QTS, QuTS hero
An allocation of resources without limits or throttling vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to prevent other systems, ap…
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Medium 4.9
QTS, QuTS hero
An allocation of resources without limits or throttling vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to prevent other systems, applications…
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High 7.5
Signal K Server Vulnerable to Denial of Service via Unrestricted Access Request Flooding
Signal K Server is a server application that runs on a central hub in a boat. A Denial of Service (DoS) vulnerability in versions prior to 2.19.0 allows an unauthenticated attacker to crash the SignalK Server by flooding the access request endpoint (`/signalk…
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High 7.5
Fetch Softworks Fetch FTP Client 5.8.2 Remote CPU Consumption Denial of Service
Fetch FTP Client 5.8.2 contains a denial of service vulnerability that allows attackers to trigger 100% CPU consumption by sending long server responses. Attackers can send specially crafted FTP server responses exceeding 2K bytes to cause excessive resource …
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High 7.5
SOUND4 IMPACT/FIRST/PULSE/Eco <=2.x ICMP Flood Attack via Network Commands
SOUND4 IMPACT/FIRST/PULSE/Eco versions 2.x contains a network vulnerability that allows unauthenticated attackers to send ICMP signals to arbitrary hosts through network command scripts. Attackers can abuse ping.php, traceroute.php, and dns.php to generate ne…
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Medium 4.3
FreshRSS globally denies access to feed via proxy modifying to 429 Retry-After
FreshRSS is a free, self-hostable RSS aggregator. From version 1.27.0 to before 1.28.0, An attacker could globally deny access to feeds via proxy modifying to 429 Retry-After for a large list of feeds on given instance, making it unusable for majority of user…
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High 7.5
Keycloak: keycloak tls client-initiated renegotiation denial of service
A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavaila…
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High 7.5
Hasura GraphQL 1.3.3 Denial of Service via Malicious GraphQL Query
Hasura GraphQL 1.3.3 contains a denial of service vulnerability that allows attackers to overwhelm the service by crafting malicious GraphQL queries with excessive nested fields. Attackers can send repeated requests with extremely long query strings and multi…
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High 7.1
Improper Content-Length Validation in HTTPS Requests on Tapo C200
The HTTPS server on Tapo C200 V3 does not properly validate the Content-Length header, which can lead to an integer overflow. An unauthenticated attacker on the same local network segment can send crafted HTTPS requests to trigger excessive memory allocation,…
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Medium 4.9
Elasticsearch Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can allow an authenticated user with snapshot restore privileges to cause Excessive Allocation (CAPEC-130) of memory and a denial of service (DoS) via crafted HTTP request.
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Medium 6.5
Kibana Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can allow a low-privileged authenticated user to cause Excessive Allocation (CAPEC-130) of computing resources and a denial of service (DoS) of the Kibana process via a crafted HTTP requ…
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Medium 6.5
Elasticsearch Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can allow a low-privileged authenticated user to cause Excessive Allocation (CAPEC-130) causing a persistent denial of service (OOM crash) via submission of oversized user setting…
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Medium 5.3
Elasticsearch Packetbeat has Excessive Allocation of Memory and CPU via Malicious IPv4 Fragments
Allocation of resources without limits or throttling (CWE-770) allows an unauthenticated remote attacker to cause excessive allocation (CAPEC-130) of memory and CPU via the integration of malicious IPv4 fragments, leading to a degradation in Packetbeat.
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Medium 5.3
Güralp Systems Fortimus Series, Minimus Series, and Certimus Series have an Allocation of Resources Without Limits or Throttling vulnerability
A vulnerability in the web interface of the Güralp Fortimus Series, Minimus Series and Certimus Series allows an unauthenticated attacker with network access to send specially-crafted HTTP requests that can cause the web service process to deliberately restar…
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High 7.5
Expr has Denial of Service via Unbounded Recursion in Builtin Functions
Expr is an expression language and expression evaluation for Go. Prior to version 1.17.7, several builtin functions in Expr, including `flatten`, `min`, `max`, `mean`, and `median`, perform recursive traversal over user-provided data structures without enforc…
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High 8.7
Servify Express does not enforce rate limiting when parsing JSON
Servify Express is a Node.js package to start an Express server and log the port it's running on. Prior to 1.2, the Express server used express.json() without a size limit, which could allow attackers to send extremely large request bodies. This can cause exc…
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Medium 5.3CVE-2025-64702 Public exploit
quic-go HTTP/3 QPACK Header Expansion DoS
quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large head…
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Medium 6.5
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to cause a denial of service condition by uploading specially crafted imag…
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High 7.5
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an unauthenticated user to create a denial of service condition by sending crafted GraphQL queri…
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Medium 6.5
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 6.3 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to cause a Denial of Service condition by sending crafted API calls with lar…
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High 8.7
XWiki's REST APIs don't enforce any limits, leading to unavailability and OOM in large wikis
XWiki is an open-source wiki software platform. Versions 16.10.10 and below, 17.0.0-rc-1 through 17.4.3 and 17.5.0-rc-1 through 17.6.0 contain a REST API which doesn't enforce any limits for the number of items that can be requested in a single request at the…
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High 8.7
432ES-IG3 Series A Denial-of-Service Vulnerability
A security issue exists within 432ES-IG3 Series A, which affects GuardLink® EtherNet/IP Interface, resulting in denial-of-service. A manual power cycle is required to recover the device.
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Medium 4.3
Authenticated Denial-of-Service via SSH
A low privileged remote attacker can use the ssh feature to execute commands directly after login. The process stays open and uses resources which leads to a reduced performance of the management functions. Switching functionality is not affected.
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Medium 6.5
Authenticated Denial-of-Service via Webshell
A low privileged remote attacker can run the webshell with an empty command containing whitespace. The server will then block until it receives more data, resulting in a DoS condition of the websserver.
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Medium 6.5
IBM watsonx.data Denial of Service
IBM watsonx.data 2.2 through 2.2.1 could allow an authenticated user to cause a denial of service through ingestion pods due to improper allocation of resources without limits.
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High 8.9
urllib3 allows an unbounded number of links in the decompression chain
urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leadin…
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High 8.7
Improper validation of <img> tag size in Text component parser
Allocation of Resources Without Limits or Throttling, Improper Validation of Specified Quantity in Input vulnerability in The Qt Company Qt on Windows, MacOS, Linux, iOS, Android, x86, ARM, 64 bit, 32 bit allows Excessive Allocation. This issue affects users …
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Low 1.3
Interactive service agent in OpenVPN version 2.5.0 through 2.6.16 and 2.7_alpha1 through 2.7_rc2 on Windows allows a lo…
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Medium 5.5
An issue in HCL Technologies Limited HCLTech GRAGON before v.7.6.0 allows a remote attacker to execute arbitrary code v…
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Medium 6.5
ClipBucket v5 Unauthenticated Object Flagging Vulnerability
ClipBucket v5 is an open source video sharing platform. Prior to version 5.5.2 - #164, an authorization bypass vulnerability in the AJAX flagging system allows any unauthenticated user to flag any content (users, videos, photos, collections) on the platform. …
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High 7.5
Suricata is vulnerable to unbounded memory growth for decompression
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, compressed HTTP data can lead to unbounded memory growth during decompression. This …
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Medium 6.5
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that could have allowed an authenticated user with specific permissions to cause a denial of service condition through HTT…
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High 7.5
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that could have allowed an unauthenticated user to cause a Denial of Service condition by sending specifically crafted r…
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Low 2.7
VictoriaMetrics Snappy Decoder DoS Vulnerability is Causing OOM
VictoriaMetrics is a scalable solution for monitoring and managing time series data. In versions from 1.0.0 to before 1.110.23, from 1.111.0 to before 1.122.8, and from 1.123.0 to before 1.129.1, affected versions are vulnerable to DoS attacks because the sna…
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High —
Babylon's malformed vote extensions are not rejected
### Summary Adversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators. ### Impact A small g…
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Medium 6.5
vLLM vulnerable to DoS via large Chat Completion or Tokenization requests with specially crafted `chat_template_kwargs`
vLLM is an inference and serving engine for large language models (LLMs). From version 0.5.5 to before 0.11.1, the /v1/chat/completions and /tokenize endpoints allow a chat_template_kwargs request parameter that is used in the code before it is properly valid…
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Medium 5.3
Unbounded memory consumption in golang.org/x/crypto/ssh
SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.
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High 8.3
Allocation of Resources Without Limits or Throttling in Shelly Pro 4PM
Allocation of Resources Without Limits or Throttling vulnerability in Shelly Pro 4PM (before v1.6) allows Excessive Allocation via network.
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Critical 9.2
joserfc has Possible Uncontrolled Resource Consumption Vulnerability Triggered by Logging Arbitrarily Large JWT Token Payloads
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In versions from 1.3.3 to before 1.3.5 and from 1.4.0 to before 1.4.2, the ExceededSizeError exception messages are embedded with non-d…
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Medium 4.3CVE-2025-54320 Public exploit
In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the invite user function, leading to an email…