Weakness (CWE)
CWE-1287: Improper Validation of Specified Type of Input
The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
How to prevent it (1 mitigation)
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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.
Source: MITRE CWE-1287
180 results · Feed
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Medium 6.2
Vulnerabilities in the QNX io-char library Impacts QNX Software Development Platform
Improper Input Validation in the io-char library's DCMD_CHR_TCINJECTC devctl() handler could allow an attacker with local access to cause data tampering in the memory input buffer of the Character I/O device driver.
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Critical 9.9
A vulnerability that could allow an attacker to compromise a system.
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Critical 10.0
Memory Corruption Vulnerability in SAP NetWeaver AS ABAP (Internet Communication Manager)
SAP NetWeaver Application Server ABAP does not sufficiently validate certain network input processed by an internal component. An unauthenticated attacker could send specially crafted network traffic to trigger a memory corruption condition in the affected fu…
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Medium 5.3
IBM Safer Payments could allow an authenticated user to obtain sensitive information
IBM Safer Payments 6.4.0.00 through 6.4.2.11, 6.5.0.00 through 6.5.0.09, 6.6.0.00 through 6.6.0.07, 6.7.0.00 through 6.7.0.03, and 6.8.0.00 could allow an authenticated user to obtain sensitive information, caused by improper user input validation. By using a…
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Critical 9.8
RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting "tz" to tzset(), , so a FIFO or device path blocks the CGI process
RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting "tz" to tzset(), , so a FIFO or device path blocks the CGI process. The normalize_params method sends any query key matching /tz/i to tz(), which sets $ENV{TZ} to that value,…
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Critical 9.1
Apache Kafka: Broker silently skips JWT signature verification for SASL/OAUTHBEARER when the JWKS endpoint URL is not configured
A Kafka broker using SASL/OAUTHBEARER with the default validator (sasl.oauthbearer.jwt.validator.class=DefaultJwtValidator) selects its implementation from configuration. When sasl.oauthbearer.jwks.endpoint.url is set, the validator verifies the JWT signature…
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Medium 5.4
OpenStack Ironic before 39.0.1 allows DELETE and GET via vendor_passthru, e.g., to delete accounts from the BMC's Redfi…
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Medium 4.8
Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via Tag Imports
Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains an improper validation vulnerability that accepts components whose core modules import WebAssembly tags with a subtype of the original type. Malicious guests can mis-type exception object payload…
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Critical 9.2CVE-2026-114509 Public exploit
Laravel TokenGuard authentication bypass through non-string API credentials
Laravel is a web application framework. Prior to 12.68.0 and 13.29.0, TokenGuard configured as a standard token-based API guard does not reject a crafted non-string credential. Under affected MySQL or MariaDB configurations, the authentication lookup can matc…
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High 7.5
GitPython before 3.2.0 Command Execution via ls_remote ext:: URLs
GitPython before 3.2.0 contains a remote code execution vulnerability that allows attackers to run commands because Git.ls_remote forwards URLs without check_unsafe_protocols validation. Attackers can supply ext:: remote-helper URLs to execute commands when g…
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High 7.5
.NET Framework Tampering Vulnerability
Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.
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High 8.8
Microsoft Office SharePoint Elevation of Privilege Vulnerability
No cwe for this issue in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
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Low 3.1
Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Improper Validation of Spec…
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High 8.1
fast-jwt : Silent claim-validator bypass when JWT payload is a JSON array
fast-jwt provides fast JSON Web Token (JWT) implementation. Prior to 6.3.0, fast-jwt createVerifier accepts a validly signed JWT whose payload is a JSON array because src/decoder.js checks that the payload is an object but does not reject arrays. The claim va…
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High 7.1
ICMPv6 option validation accepts a trailing byte residue, sending the Router Advertisement, Neighbor Solicitation, Neighbor Advertisement and Redirect option walkers past the packet or into a permanent loop
In Eclipse ThreadX NetX Duo versions up to and including 6.5.2.202603, built with IPv6, the ICMPv6 option validator accepts an option area that ends in a one- or two-byte residue, and the Router Advertisement, Neighbor Solicitation, Neighbor Advertisement and…
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Medium 5.9
CVE-2026-94570
SGLang contains a DoS vulnerability caused by missing input validation for AUX_DATA ZeroMQ control messages in the Decode worker, which enables an unauthenticated remote attacker with network reachability to the Decode control PULL socket to terminate the Dec…
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Low 2.6
Mattermost Desktop App plugin popout scheme validation bypass
Mattermost Desktop App versions <=6.2 6.2.2.0 fail to validate the URL scheme when checking whether a target URL is internal to the connected server, which allows a network-positioned attacker to load a plugin popout window over an insecure connection via a l…
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Medium 6.5
A vulnerability has been identified in WTV676-HB6035 Web Interface (All versions < V3.94), WTV776-HB6035 Web Interface …
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Medium 4.3
Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/open_webui/models/calendar.py stored the calendar event meta.alert_minutes value without type validation and the shared upcoming-event sched…
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High 7.5
Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths
Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths. Non-numeric and non-ASCII prefix lengths are accepted and treated as 0. Integers over 31 bits are silently truncated. A single malformed mask will poison the lookup table. The result …
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Medium 6.5
PocketMine-MP before 4.2.9 Denial of Service via NBT Deserialization
PocketMine-MP versions before 4.2.9 fail to properly validate NBT data types during deserialization of inventory transaction packets from clients. Attackers can send crafted inventory transactions with malformed NBT tags to trigger server crashes and cause de…
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Medium 6.5
YesWiki: SQL injection via the `recentchanges` action `period` argument leading to arbitrary DB read
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the recentchanges action (actions/recentchanges.php) accepts a period argument from two disjoint parameter spaces. A whitelist validates only the URL form against ['day','week','month']. The act…
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High 8.0
yast2-users: OS command injection via LDAP-supplied shadowLastChange/shadowExpire attribute
An OS command injection vulnerability was found in yast2-users. When displaying the "Password Settings" tab of a user, get_password_term() in src/include/users/dialogs.rb read the shadowLastChange and shadowExpire fields with GetString(), which performs no nu…
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Low 2.1
Ash.Type.Union with :map_with_tag does not force the tag on dump, enabling tag confusion
Improper Validation of Specified Type of Input vulnerability in ash-project ash lets an attacker confuse the stored type tag of an Ash.Type.Union value that uses storage: :map_with_tag, bypassing that member's validation and any tag-based authorization. For a…
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Medium 5.9
github.com/graphql-go/graphql (GraphQL for Go) through 0.8.1 does not validate that a scalar variable value matches its…
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Medium 6.0
Cri-o: cri-o: unvalidated image env var causes daemon crash
A flaw was found in CRI-O's container-creation environment-variable handling (`mergeEnvs` in `server/utils.go`, consumed by `setupContainerEnvironmentAndWorkdir` in `server/container_create.go`). When a `CreateContainer` request supplies a `nil` CRI `Envs` fi…
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Medium 5.7
An ACAP configuration file lacks input validation, which could potentially lead to privilege escalation. This vulnerabi…
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High 8.1CVE-2026-18830 Public exploit
Insufficient input validation in Amazon Bedrock AgentCore harness InvokeHarness API
Insufficient input validation in Amazon Bedrock AgentCore harness might allow an authenticated remote user to execute configured tools bypassing model invocation and security controls via crafted content blocks in conversation messages. AWS has addressed this…
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Critical 9.1
XML::Sig versions before 0.71 for Perl allow XPath injection in ID lookup
XML::Sig versions before 0.71 for Perl allow XPath injection in ID lookup. verify() and _get_signed_xml() in lib/XML/Sig.pm build XPath expressions by concatenating the SignedInfo/Reference/@URI value read from the document being verified. The value is neithe…
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Medium 6.0
In geniezone, there is a possible escalation of privilege due to a missing permission check. This could lead to local e…
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High 8.1
OTP Bypass in Magarsus' IDM-MFA
Improper validation of specified type of input vulnerability in Magarsus Consulting Ltd. Co. IDM-MFA allows Authentication Bypass. This issue affects IDM-MFA: from 2025.11.27 before 2026.03.10.
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High 7.5
.NET Framework Denial of Service Vulnerability
Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to deny service over a network.
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High 8.8
Symfony: OidcTokenHandler Accepts JWTs Missing aud/iss/exp Claims
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, OidcTokenHandler::verifyClaims() registered audience (aud), issuer (iss), and expiry (exp) checkers but did not pass the man…
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Medium 5.5
Microsoft Word Information Disclosure Vulnerability
Improper validation of specified type of input in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
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High 7.5
PraisonAI before 4.6.78 Prompt Injection Defense Bypass
PraisonAI versions before 4.6.78 contain a prompt injection defense misconfiguration where the block threshold defaults to CRITICAL severity, allowing HIGH-level threats to pass through unblocked. Attackers can submit single-vector prompt injection attacks su…
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Critical 9.9
Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer
Missing validation of "valuesFrom" references in Helm Deployer of SUSE Rancher Fleet 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.15 could be used by owners of one tenant to access fleet credentials of other tenants.
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Medium 6.9
vLLM: temperature=NaN and temperature=Infinity bypass validation and propagate to GPU kernels
vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, ll temperature validation gates use comparison operators (<, >), which silently evaluate to False for NaN and for positive Infinity in Python's IEEE 754 float semant…
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High 7.1
Improper JSON Input Validation in WebSocket API Leads to Denial of Service
A denial-of-service vulnerability exists in the WebSocket API due to insufficient validation and handling of JSON-based requests. A low-privileged authenticated attacker can send a specially crafted request that causes service disruption and may result in an …
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High 8.1
Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking
Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.c…
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High 8.1
Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.
The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with a…