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
3,819 results · Feed
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Medium 6.3
o2oa URL Fetching FileAction.java FileAction server-side request forgery
A weakness has been identified in o2oa up to 10.0. This affects the function FileAction of the file FileAction.java of the component URL Fetching. Executing a manipulation of the argument fileUrl can lead to server-side request forgery. It is possible to laun…
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High 7.3
BigSweetPotatoStudio HyperChat AI Proxy Middleware aiProxyMiddleware.mts fetch server-side request forgery
A vulnerability was identified in BigSweetPotatoStudio HyperChat up to 2.0.0-alpha.63. Affected by this issue is the function fetch of the file packages/core/src/http/aiProxyMiddleware.mts of the component AI Proxy Middleware. Such manipulation of the argumen…
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High 7.3
TencentCloudBase CloudBase-MCP open-url API Endpoint interactive-server.ts openUrl server-side request forgery
A vulnerability was found in TencentCloudBase CloudBase-MCP up to 2.17.0. Affected is the function openUrl of the file mcp/src/interactive-server.ts of the component open-url API Endpoint. The manipulation of the argument req.body.url results in server-side r…
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High 7.3
ChatGPTNextWeb NextChat Artifacts Endpoint route.ts storeUrl server-side request forgery
A weakness has been identified in ChatGPTNextWeb NextChat up to 2.16.1. This affects the function storeUrl of the file app/api/artifacts/route.ts of the component Artifacts Endpoint. This manipulation of the argument ID causes server-side request forgery. It …
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High 7.3
ChatGPTNextWeb NextChat route.ts proxyHandler server-side request forgery
A security flaw has been discovered in ChatGPTNextWeb NextChat up to 2.16.1. Affected by this issue is the function proxyHandler of the file app/api/[provider]/[...path]/route.ts. The manipulation results in server-side request forgery. The attack may be perf…
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High 7.3
dmitryglhf mcp-url-downloader server.py _validate_url_safe server-side request forgery
A vulnerability has been found in dmitryglhf mcp-url-downloader up to 4b8cf2de55f6e8864a77d108e8a94a5b8e4394c6. Affected by this issue is the function _validate_url_safe of the file src/mcp_url_downloader/server.py. Such manipulation of the argument url leads…
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Medium 6.3
dh1011 auto-favicon MCP Tool server.py generate_favicon_from_url server-side request forgery
A vulnerability was found in dh1011 auto-favicon up to f189116a9259950c2393f114dbcb94dde0ad864b. This issue affects the function generate_favicon_from_url of the file src/auto_favicon/server.py of the component MCP Tool. The manipulation of the argument image…
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High 7.3
JoeCastrom mcp-chat-studio LLM Models API llm.js server-side request forgery
A vulnerability was detected in JoeCastrom mcp-chat-studio up to 1.5.0. Affected by this issue is some unknown functionality of the file server/routes/llm.js of the component LLM Models API. Performing a manipulation of the argument req.query.base_url results…
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High 7.3
AlejandroArciniegas mcp-data-vis HTTP Request server.js axios server-side request forgery
A security vulnerability has been detected in AlejandroArciniegas mcp-data-vis up to de5a51525a69822290eaee569a1ab447b490746d. Affected by this vulnerability is the function axios of the file src/servers/web-scraper/server.js of the component HTTP Request Han…
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High 7.3
ShadowCloneLabs GlutamateMCPServers puppeteer_navigate index.ts server-side request forgery
A vulnerability was determined in ShadowCloneLabs GlutamateMCPServers up to e2de73280b01e5d943593dd1aa2c01c5b9112f78. Affected by this issue is some unknown functionality of the file src/puppeteer/index.ts of the component puppeteer_navigate. Executing a mani…
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Medium 6.3
HBAI-Ltd Toonflow-app getCodeByLink Endpoint getCodeByLink.ts fetch server-side request forgery
A vulnerability was found in HBAI-Ltd Toonflow-app up to 1.1.1. This affects the function fetch of the file src/routes/setting/vendorConfig/getCodeByLink.ts of the component getCodeByLink Endpoint. The manipulation of the argument Link results in server-side …
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High 7.3
BidingCC BuildingAI Remote Upload API file-storage.service.ts uploadRemoteFile server-side request forgery
A vulnerability has been found in BidingCC BuildingAI up to 26.0.1. Impacted is the function uploadRemoteFile of the file packages/core/src/modules/upload/services/file-storage.service.ts of the component Remote Upload API. The manipulation of the argument ur…
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High 7.3
Typecho Ping Back Service Endpoint Service.php sendPingHandle server-side request forgery
A vulnerability was found in Typecho up to 1.3.0. This vulnerability affects the function Service::sendPingHandle of the file var/Widget/Service.php of the component Ping Back Service Endpoint. The manipulation of the argument X-Pingback/link results in serve…
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Medium 4.7
pagekit download server-side request forgery
A vulnerability was identified in pagekit up to 1.0.18. Affected by this issue is some unknown functionality of the file /index.php/admin/system/update/download. The manipulation of the argument url leads to server-side request forgery. Remote exploitation of…
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Medium 6.3
IhateCreatingUserNames2 AiraHub2 Endpoint AiraHub.py sync_agents server-side request forgery
A vulnerability was found in IhateCreatingUserNames2 AiraHub2 up to 3e4b77fd7d48ed811ffe5b8d222068c17c76495e. Affected is the function connect_stream_endpoint/sync_agents of the file AiraHub.py of the component Endpoint. Performing a manipulation results in s…
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Medium 6.3
devlikeapro WAHA API Request media.controller.ts server-side request forgery
A flaw has been found in devlikeapro WAHA up to 2026.3.4. This affects an unknown function of the file src/api/media.controller.ts of the component API Request Handler. This manipulation causes server-side request forgery. The attack can be initiated remotely…
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Low 3.1
angchain-openai: Image token counting SSRF protection can be bypassed via DNS rebinding
LangChain is a framework for building agents and LLM-powered applications. Prior to 1.1.14, langchain-openai's _url_to_size() helper (used by get_num_tokens_from_messages for image token counting) validated URLs for SSRF protection and then fetched them in a …
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Medium 6.5
LangChain: HTMLHeaderTextSplitter.split_text_from_url SSRF Redirect Bypass
LangChain is a framework for building agents and LLM-powered applications. Prior to langchain-text-splitters 1.1.2, HTMLHeaderTextSplitter.split_text_from_url() validated the initial URL using validate_safe_url() but then performed the fetch with requests.get…
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Medium 6.8
Axios: no_proxy bypass via IP alias allows SSRF
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests to 127.0.0.1 and [::1] still route through the proxy instea…
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High 7.2
Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range (other than 127.0.0.1) to completely bypass the NO_PROX…
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Low 2.2
@astrojs/cloudflare: SSRF via redirect following in Cloudflare image-binding-transform endpoint
@astrojs/cloudflare is an SSR adapter for use with Cloudflare Workers targets. Prior to 13.1.10, the fetch() call for remote images in packages/integrations/cloudflare/src/utils/image-binding-transform.ts uses the default redirect: 'follow' behavior. This all…
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High 8.1
Kyverno: ServiceAccount token leaked to external servers via apiCall service URL
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoin…
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Medium 4.9
Xibo CMS has Authenticated Server-Side Request Forgery (SSRF) in Remote DataSet Functionality
Xibo is an open source digital signage platform with a web content management system and Windows display player software. An authenticated Server-Side Request Forgery (SSRF) vulnerability in versions prior to 4.4.1 allows users with DataSet permissions to mak…
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High 7.1
OpenClaw < 2026.3.28 - SSRF Guard Bypass via IPv6 Special-Use Ranges
OpenClaw before 2026.3.28 contains an SSRF guard bypass vulnerability that fails to block four IPv6 special-use ranges. Attackers can exploit this by crafting URLs targeting internal or non-routable IPv6 addresses to bypass SSRF protections.
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Critical 10.0
Microsoft Entra ID Entitlement Management Spoofing Vulnerability
Server-side request forgery (ssrf) in Microsoft Entra ID Entitlement Management allows an unauthorized attacker to perform spoofing over a network.
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High 8.6
Microsoft Purview eDiscovery Elevation of Privilege Vulnerability
Server-side request forgery (ssrf) in Microsoft Purview allows an unauthorized attacker to elevate privileges over a network.
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Critical 9.3
Microsoft Dynamics 365 (online) Spoofing Vulnerability
Server-side request forgery (ssrf) in Microsoft Dynamics 365 (Online) allows an unauthorized attacker to perform spoofing over a network.
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High 7.1
Flowise: APIChain Prompt Injection SSRF in GET/POST API Chains
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) vulnerability exists in FlowiseAI's POST/GET API Chain components that allows unauthenticated attackers to force the …
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High 7.1
Flowise: SSRF Protection Bypass (TOCTOU & Default Insecure)
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the core security wrappers (secureAxiosRequest and secureFetch) intended to prevent Server-Side Request Forgery (SSRF) contain multiple logic flaws. These…
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High 7.1
Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protecti…
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High 8.5
SocialEngine <= 7.8.0 Blind SSRF via /core/link/preview
SocialEngine versions 7.8.0 and prior contain a blind server-side request forgery vulnerability in the /core/link/preview endpoint where user-supplied input passed via the uri request parameter is not sanitized before being used to construct outbound HTTP req…
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Medium 5.5CVE-2026-41177 Public exploit
Squidex has Blind SSRF via file:// Protocol in Restore API leading to Local File Interaction
Squidex is an open source headless content management system and content management hub. Prior to version 7.23.0, the Squidex Restore API is vulnerable to Blind Server-Side Request Forgery (SSRF). The application fails to validate the URI scheme of the user-s…
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High 7.3
Squidex vulnerable to Server-Side Request Forgery (SSRF) via URL-based asset upload (/api/apps/{app}/assets)
Squidex is an open source headless content management system and content management hub. Prior to version 7.23.0, an SSRF vulnerability allows a user with asset upload permission to force the server to fetch arbitrary URLs, including localhost/private network…
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High 7.3
SSRF via Jint Scripting Engine HTTP Functions Due to Missing SSRF Protection on "Jint" HttpClient
Squidex is an open source headless content management system and content management hub. Versions prior to 7.23.0 have a Server-Side Request Forgery (SSRF) vulnerability due to missing SSRF protection on the `Jint` HTTP client used by scripting engine functio…
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High 7.2
Squidex has SSRF via Backup Restore Endpoint — Admin-Controlled URL Download Allows Internal and External Requests
Squidex is an open source headless content management system and content management hub. Prior to version 7.23.0, the `RestoreController.PostRestoreJob` endpoint allows an administrator to supply an arbitrary URL for downloading backup archives. This URL is f…
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High 8.5
WeKan < 8.35 SSRF via Webhook URL
WeKan before 8.35 contains a server-side request forgery vulnerability in webhook integration URL handling where the URL scheme field accepts any string without protocol restriction or destination validation. Attackers who can create or modify integrations ca…
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High 8.5
An issue was discovered in guardsix (formerly Logpoint) ODBC Enrichment Plugins before 5.2.1 (5.2.1 is used in guardsix…
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Medium 5.5
Craft CMS has a host header injection leading to SSRF via resource-js endpoint
Craft CMS is a content management system (CMS). In versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14, the `resource-js` endpoint in Craft CMS allows unauthenticated requests to proxy remote JavaScript resources. When `trustedHosts` i…
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Medium 5.5
Craft CMS has Server-Side Request Forgery (SSRF) with Asset Uploads Mutations
Craft CMS is a content management system (CMS). Versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14 are vulnerable to Server-Side Request Forgery. The exploitation requires a few permissions to be enabled in the used GraphQL schema: "E…
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High 7.7
AVideo's SSRF via same-domain hostname with alternate port bypasses isSSRFSafeURL
WWBN AVideo is an open source video platform. In versions 29.0 and below, the `isSSRFSafeURL()` function in `objects/functions.php` contains a same-domain shortcircuit (lines 4290-4296) that allows any URL whose hostname matches `webSiteRootURL` to bypass all…