Weakness (CWE)
CWE-918: Server-Side Request Forgery
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
How to prevent it (3 mitigations)
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Implementation, Operation
If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation [REF-1511].
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Implementation, Operation
If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation [REF-1511].
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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.
When constructing outgoing requests from input strings, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. This will indirectly limit the scope of an attack, but this technique is less important than proper output encoding and escaping.
Source: MITRE CWE-918
3,816 results · Feed
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Medium 5.3
Activepieces: Server-side request forgery in MCP tool validation endpoint
Activepieces is an open source AI workflow automation platform. Prior to 0.82.0, the POST /api/v1/projects/:projectId/mcp-server/validate-agent-mcp-tool endpoint makes an outbound HTTP or SSE request to a user-supplied serverUrl without URL validation or SSRF…
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Medium 5.4
TypeBot's WhatsApp status forwarding uses unvalidated user-controlled URLs, allowing SSRF from the Typebot server
TypeBot is a chatbot builder tool. Prior to version 3.17.0, Typebot's WhatsApp status forwarding feature stores a workspace-configured webhook forwarding URL and later POSTs WhatsApp marketing/error status events to it from the server. The stored URL is only …
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Critical 9.3
SeaweedFS: Unauthenticated SSRF with response read-back via VolumeServer.FetchAndWriteNeedle
SeaweedFS is a distributed storage system. Prior to 4.24, VolumeServer.FetchAndWriteNeedle in weed/server/volume_grpc_remote.go fetches a caller-supplied remote endpoint through weed/remote_storage/s3/s3_storage_client.go and writes the response into a needle…
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Medium 5.1
Server-Side Request Forgery via Favicon Retrieval in Lookyloo PlaywrightCapture
A Server-Side Request Forgery (SSRF) vulnerability existed in Lookyloo's PlaywrightCapture when the only_global_lookup option was enabled. PlaywrightCapture implements this option to prevent captures from accessing local, loopback, or otherwise non-public net…
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Medium 5.4
Craft CMS 5.0.0-RC1 before 5.10.6 SSRF via GraphQL asset mutation
Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 contain a server-side request forgery vulnerability in the GraphQL save<Volume>Asset mutation, which fetches an attacker-supplied URL server-side. The anti-SSRF validation is incompl…
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Medium 6.4
n8n before 2.32.1 SSRF Protection Bypass via MCP Client
n8n versions before 2.32.1 contain a server-side request forgery protection bypass vulnerability in the MCP Client node that allows authenticated users to bypass SSRF protections. Attackers can craft workflows that send requests to internal or blocked hosts w…
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High 8.2
n8n before 1.123.67 Arbitrary File Read via Send Email Node
n8n before 1.123.67, 2.x before 2.31.5, and 2.32.x before 2.32.1 contain a type confusion vulnerability in the Send Email node, which does not enforce that its message fields are strings. A crafted non-string value supplied from a workflow expression into the…
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High 7.4
Openshift/console: authenticated ssrf with full response reflection and path neutralization via dev console webhook helpers in openshift console
An authenticated SSRF flaw was found in the OpenShift Console Dev Console webhook helpers. User-supplied target URLs are fetched server-side without validation, with path neutralization enabling arbitrary endpoint targeting and full response reflection from t…
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High 7.4
Openshift/console: namespace tenant ssrf with egress bypass, catalog poisoning, and admin-mediated supply chain escalation via projecthelmchartrepository in openshift console
A Server-Side Request Forgery and supply chain flaw was found in the OpenShift Console Helm catalog proxy. A namespace tenant can plant a ProjectHelmChartRepository with an arbitrary URL that the console pod fetches server-side, bypassing tenant egress restri…
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High 7.5
Pinry Pinry - Server-Side Request Forgery
A server-side request forgery vulnerability in Pinry through 2.1.13 allows unauthenticated remote attackers to make the server issue HTTP requests to arbitrary internal or external hosts via the pin-from-URL feature. The feature passes the user-supplied URL d…
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Medium 6.5
Apioo Fusio - Server-Side Request Forgery
A server-side request forgery vulnerability in Apioo Fusio 8.8.3 allows authenticated consumer-role users to make the server issue HTTP requests to internal network addresses by registering a webhook URL pointing to an internal host. The webhook registration …
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Medium 6.5
Friendica Friendica - Server-Side Request Forgery
A server-side request forgery vulnerability in Friendica through the 2026.08-dev branch allows authenticated users with a free self-registered account to probe internal network services via the link-preview endpoint. The endpoint fetches any user-supplied URL…
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Medium 6.5
HumanSignal Label Studio - Server-Side Request Forgery
A server-side request forgery vulnerability in HumanSignal Label Studio through 1.24.0.dev0 exists because SSRF_PROTECTION_ENABLED is set to false by default. The import-from-URL endpoint fetches any caller-supplied URL including internal loopback addresses o…
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High 7.5
Dub Dub - Server-Side Request Forgery
A server-side request forgery vulnerability in Dub as of 2026-07-10 allows unauthenticated remote attackers to make the server issue HTTP requests to arbitrary internal or external hosts via the metatags edge endpoint. The endpoint fetches any caller-supplied…
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High 8.8
Server-Side Request Forgery (SSRF)
A legacy endpoint in Command Center contained an unauthenticated server-side request forgery (SSRF) vulnerability related to the handling of arbitrary target URLs. Software customers upgrade to resolved maintenance release. Update Command Center.
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High 8.7
cti-transmute Unauthenticated SSRF via Hostnames Resolving to Internal IP Addresses
Affected versions of cti-transmute contain an SSRF vulnerability in the /fetch_misp_event and /misp_search_events endpoints. The URL validation routine checked whether a supplied hostname was itself an IP literal and rejected private, loopback, link-local, or…
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Critical 9.1CVE-2026-19516 Public exploit
CVE-2026-19516 CVE Record
A caller-supplied X-Grafana-URL request header controls the destination of mcp-grafana's outbound requests, and the grafana_api_request tool lets the caller also choose the HTTP method, path, and body. Because the destination is not restricted to the configur…
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High 8.5
An issue in usememos through v0.30.0 allows a remote authenticated attacker to perform Server-Side Request Forgery (SSR…
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Medium 6.3
Mastodon: SSRF Protection Bypass via IPv4-compatible IPv6 Addresses
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, PrivateAddressCheck.private_address? in app/lib/private_address_check.rb normalized IPv4-mapped IPv6 addresses but did not recognize …
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Medium 6.9
Webhook SSRF guard bypassed by IPv6 transition addresses (NAT64/6to4/Teredo pass is_global check) in vulnerability-lookup
The webhook URL validator in `website/notifications/webhooks.py` uses `ip.is_global` to reject non-public addresses after DNS resolution. IPv6 transition addresses (NAT64 `64:ff9b::/96`, 6to4 `2002::/16`, Teredo `2001:0000::/32`) are classified as globally ro…
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High 7.7
Koito - Authenticated Server-Side Request Forgery via Album Image URL Parameter
A server-side request forgery (SSRF) vulnerability in gabehf/Koito through v0.3.2 allows an authenticated user to make the server perform HTTP requests to arbitrary internal or external hosts by supplying a crafted image_url value in the PATCH /apis/web/v1/al…
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High 8.6
duhow xiaoai-patch - Server-Side Request Forgery in /auth Endpoint
A server-side request forgery (SSRF) vulnerability in duhow/xiaoai-patch through commit fb07049 allows a remote attacker to make the Xiaomi smart speaker perform HTTP requests to arbitrary internal or external URLs. The /auth endpoint in api/main.py uses the …
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High 7.7
automatisch - Server-Side Request Forgery via HTTP Request Custom Action
A server-side request forgery (SSRF) vulnerability in automatisch through commit 41f3c56 allows a low-privileged authenticated user with 'manage Flow' permission to make the server fetch arbitrary URLs and retrieve the full response body via the HTTP Request …
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Medium 5.0
All-in-One Video Gallery < 4.9.2 - Subscriber+ Server-Side Request Forgery via 'vdl' Parameter
All-in-One Video Gallery registers a public, unauthenticated file-download handler triggered by `?vdl=<post_id>` on any `aiovg_videos` post (`public/video.php`, `AIOVG_Public_Video::download_video()`), which reads the post's `mp4` meta value and streams that …
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Medium 5.3
Podcast Player < 8.3.1 - Unauthenticated Server-Side Request Forgery
The Podcast Player WordPress plugin before 8.3.1 does not validate the destination of a server-side request built from user-supplied input, allowing unauthenticated attackers to make the server issue requests to arbitrary hosts and read back responses that pa…
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Low 2.2
LearnPress < 4.4.4 - Instructor+ Server-Side Request Forgery via openai_apply_image_feature
The LearnPress WordPress plugin before 4.4.4 does not validate a user-supplied URL before the server fetches it, allowing users with the instructor role to induce the server to issue requests to arbitrary external hosts, a blind and bounded server-side reques…
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Medium 6.3
dmitriiweb article-scraper-mcp server.py fetch_article server-side request forgery
A vulnerability was detected in dmitriiweb article-scraper-mcp 1.0.0. This vulnerability affects the function fetch_article of the file news_scraper_mcp/server.py. The manipulation of the argument url results in server-side request forgery. The attack may be …
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High 7.3
adafap api-mcp Proxy API Endpoint route.ts customAxios server-side request forgery
A security vulnerability has been detected in adafap api-mcp up to 92b9a5d04acfec165c7d4ef852496593aa87be06. This affects the function customAxios of the file app/api/proxy/route.ts of the component Proxy API Endpoint. The manipulation of the argument url lea…
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Low 3.7
Server-Side Request Forgery (SSRF) in nltk/nltk
A Server-Side Request Forgery (SSRF) vulnerability exists in nltk/nltk versions 3.9.4 and the current develop branch. The `nltk.pathsec.validate_network_url()` function, intended to prevent SSRF by rejecting internal network addresses, fails to reject IPs in …
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Medium 5.3
PhialsBasement KoboldCPP-MCP-Server BaseConfigSchema index.ts makeRequest server-side request forgery
A weakness has been identified in PhialsBasement KoboldCPP-MCP-Server 1.0.0. Affected by this issue is the function makeRequest of the file src/index.ts of the component BaseConfigSchema. Executing a manipulation of the argument apiUrl can lead to server-side…
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Medium 5.3
KS-GEN-AI jira-mcp-server add_attachment_from_public_url index.ts axios.get server-side request forgery
A vulnerability was found in KS-GEN-AI jira-mcp-server 0.2.0. This affects the function axios.get of the file src/index.ts of the component add_attachment_from_public_url. The manipulation of the argument imageUrl results in server-side request forgery. The a…
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Medium 6.3
NocteDefensor LudusMCP read_range_config rangeConfig.ts server-side request forgery
A vulnerability has been found in NocteDefensor LudusMCP 1.0.24. Affected by this vulnerability is an unknown functionality of the file src/tools/rangeConfig.ts of the component read_range_config. The manipulation of the argument Source leads to server-side r…
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Low 3.1
mifi lossless-cut Built-in HTTP API Service httpServer.ts server-side request forgery
A vulnerability was determined in mifi lossless-cut up to 3.69.0. Affected by this issue is some unknown functionality of the file src/main/httpServer.ts of the component Built-in HTTP API Service. Executing a manipulation can lead to server-side request forg…
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Medium 6.3
anubissbe ProjectHub-Mcp Webhooks API complete_backend.js server-side request forgery
A weakness has been identified in anubissbe ProjectHub-Mcp up to 5.0.0. This affects an unknown function of the file backend-fix/complete_backend.js of the component Webhooks API. This manipulation of the argument url causes server-side request forgery. Remot…
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Medium 6.3
aliyun alibabacloud-dataworks-mcp-server initResources.ts ReadResourceRequestSchema server-side request forgery
A security flaw has been discovered in aliyun alibabacloud-dataworks-mcp-server up to 1.0.43. The impacted element is the function ReadResourceRequestSchema of the file src/resources/initResources.ts. The manipulation of the argument request.params.uri result…
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Medium 5.3
adenot mcp-google-search read_webpage index.ts server-side request forgery
A vulnerability was determined in adenot mcp-google-search up to 0.3.1. Impacted is an unknown function of the file src/index.ts of the component read_webpage. Executing a manipulation of the argument url can lead to server-side request forgery. The attack is…
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High 7.7CVE-2026-67620 Public exploit
Flowise 3.1.4 SSRF via fetch-links Endpoint Incomplete Deny-List
Flowise through 3.1.4 contains a server-side request forgery vulnerability in the SSRF guard implemented in httpSecurity.ts, where the DEFAULT_DENY_LIST omits the Oracle Cloud Infrastructure metadata endpoint 192.0.0.192 and the Alibaba Cloud metadata endpoin…
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Medium 6.3
HKUDS nanobot Provider-returned Image URL image_generation.py _download_image_data_url server-side request forgery
A vulnerability has been found in HKUDS nanobot up to 0.2.1. This affects the function _download_image_data_url of the file nanobot/providers/image_generation.py of the component Provider-returned Image URL Handler. The manipulation leads to server-side reque…
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High 8.6
Pathling: $import-pnp operation enables authenticated SSRF, credential leakage, and warehouse data poisoning
Pathling is a set of tools that make it easier to use FHIR and clinical terminology within health data analytics. Prior to version 2.0.0 of Pathling Server, the `$import-pnp` operation in Pathling Server accepts a caller-supplied `exportUrl` and uses it as th…
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High 8.7
Pathling $bulk-submit allows bearer-token exfiltration and persistent warehouse poisoning via unvalidated manifest output URLs
Pathling is a set of tools that make it easier to use FHIR and clinical terminology within health data analytics. Prior to version 2.0.0 of Pathling Server, Pathling's typed CRUD/search/batch FHIR surface allows an authenticated caller with only coarse operat…