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)
-
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].
-
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].
-
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
3,822 results · Feed
-
High 7.7
Invoice Ninja v5.12.46 and v5.12.48 is vulnerable to Server-Side Request Forgery (SSRF) in CheckDatabaseRequest.php.
-
High 7.6CVE-2026-29954 Public exploit
In KubePlus 4.1.4, the mutating webhook and kubeconfiggenerator components have an SSRF vulnerability when processing t…
-
High 7.5CVE-2026-0560 Scanner template
Server-Side Request Forgery (SSRF) in parisneo/lollms
A Server-Side Request Forgery (SSRF) vulnerability exists in parisneo/lollms versions prior to 2.2.0, specifically in the `/api/files/export-content` endpoint. The `_download_image_to_temp()` function in `backend/routers/files.py` fails to validate user-contr…
-
High 7.3
elecV2 elecV2P URL mock eAxios server-side request forgery
A vulnerability was identified in elecV2 elecV2P up to 3.8.3. This affects the function eAxios of the file /mock of the component URL Handler. Such manipulation of the argument req leads to server-side request forgery. It is possible to launch the attack remo…
-
High 7.2
Oxygen <= 6.0.8 - Unauthenticated Server-Side Request Forgery via route_path
The Oxygen Theme theme for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 6.0.8 via the laborator_calc_route AJAX action. This makes it possible for unauthenticated attackers to make web requests to arbitrary loca…
-
Critical 9.3
pyLoad: Server-Side Request Forgery via Download Link Submission Enables Cloud Metadata Exfiltration
pyLoad is a free and open-source download manager written in Python. Prior to version 0.5.0b3.dev97, PyLoad's download engine accepts arbitrary URLs without validation, enabling Server-Side Request Forgery (SSRF) attacks. An authenticated attacker can exploit…
-
High 8.5
LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce
LinkAce is a self-hosted archive to collect website links. Versions prior to 2.5.3 block direct requests to private IP literals, but still performs server-side requests to internal-only resources when those resources are referenced through an internal hostnam…
-
High 7.7
LibreChat Server-Side Request Forgery using DNS resolution
LibreChat is a ChatGPT clone with additional features. Versions 0.8.2-rc2 through 0.8.2 are vulnerable to a server-side request forgery (SSRF) attack when using agent actions or MCP. Although a previous SSRF vulnerability (https://github.com/danny-avila/Libre…
-
High 8.5
LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, `isPrivateIP()` in `packages/api/src/auth/domain.ts` fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protect…
-
Medium 6.3
letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery
A security vulnerability has been detected in letta-ai letta 0.16.4. This vulnerability affects the function _convert_message_create_to_message of the file letta/helpers/message_helper.py of the component File URL Handler. Such manipulation of the argument Im…
-
High —
Postiz has Multiple SSRF Vectors - Webhooks, RSS Feed, URL Loader
## Summary Postiz has multiple SSRF vulnerabilities where user-provided URLs are fetched server-side without any IP validation or SSRF protection. ## Vulnerable Code ### 1. Webhook Send Endpoint (Most Critical) **`apps/backend/src/api/routes/webhooks.controll…
-
High 7.5
Postiz App has a High-Severity SSRF Vulnerability via Next.js
### Impact A successful SSRF attack allows an attacker to: - Bypass firewalls to scan and interact with internal network services/ports. - Access sensitive cloud metadata services (e.g., AWS IMDS 169.254.169.254) to potentially leak instance credentials. - Pi…
-
Medium 5.3
AVideo has SSRF Protection Bypass via HTTP Redirect in Image Download Endpoints
WWBN AVideo is an open source video platform. In versions up to and including 26.0, `isSSRFSafeURL()` validates URLs against private/reserved IP ranges before fetching, but `url_get_contents()` follows HTTP redirects without re-validating the redirect target.…
-
High 7.3
mingSoft MCMS Editor Endpoint BaseAction.java catchImage server-side request forgery
A weakness has been identified in mingSoft MCMS up to 5.5.0. This issue affects the function catchImage of the file net/mingsoft/cms/action/BaseAction.java of the component Editor Endpoint. Executing a manipulation of the argument catchimage can lead to serve…
-
Medium 4.8
calibre has Server-Side Request Forgery in ebook viewer backend
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader's web view allows an attacker to…
-
High 8.6
Server-Side Request Forgery in BedrockProxyChatModel via Unvalidated Media URL Fetching
Spring AI's spring-ai-bedrock-converse contains a Server-Side Request Forgery (SSRF) vulnerability in BedrockProxyChatModel when processing multimodal messages that include user-supplied media URLs. Insufficient validation of those URLs allows an attacker to …
-
Medium 6.3
Page-Replica Page Replica Endpoint sitemap sitemap.fetch server-side request forgery
A vulnerability was identified in Page-Replica Page Replica up to e4a7f52e75093ee318b4d5a9a9db6751050d2ad0. The impacted element is the function sitemap.fetch of the file /sitemap of the component Endpoint. The manipulation of the argument url leads to server…
-
Medium 6.5CVE-2026-33693 Public exploit
Lemmy's Activitypub-Federation has SSRF via 0.0.0.0 bypass in activitypub-federation-rust v4_is_invalid()
Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.7.0-beta.9, the `v4_is_invalid()` function in `activitypub-federation-rust` (`src/utils.rs`) does not check for `Ipv4Addr::UNSPECIFIED` (0.0.0.0). An unauthenticated attacker controlli…
-
High 7.5
Server-Side Request Forgery (SSRF) vulnerability exists in the AnnounContent of the /admin/read.php in OTCMS V7.66 and …
-
Medium 4.7
Streamlit on Windows has Unauthenticated SSRF Vulnerability (NTLM Credential Exposure)
Streamlit is a data oriented application development framework for python. Streamlit Open Source versions prior to 1.54.0 running on Windows hosts have an unauthenticated Server-Side Request Forgery (SSRF) vulnerability. The vulnerability arises from improper…
-
Medium 4.1
PinchTab has Unauthenticated Blind SSRF in Task Scheduler via Unvalidated callbackUrl
PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab v0.8.3 contains a server-side request forgery issue in the optional scheduler's webhook delivery path. When a task is submitted to `POST /tasks` with a us…
-
Low 2.3
Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs
Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in `PhotoUrlRule.php` can be bypassed using DNS rebinding. The IP validation check (line 86-89) only activates when the hostname is an IP address. When a domain n…
-
Medium 4.3
OpenID Connect / OAuth client - Moderately critical - Server-side request forgery, Information disclosure - SA-CONTRIB-2026-025
Server-Side Request Forgery (SSRF) vulnerability in Drupal OpenID Connect / OAuth client allows Server Side Request Forgery.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0.
-
Medium 5.3
Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl — loopback and link-local IPs not blocked
Lychee is a free, open-source photo-management tool. The patch introduced for GHSA-cpgw-wgf3-xc6v (SSRF via `Photo::fromUrl`) contains an incomplete IP validation check that fails to block loopback addresses and link-local addresses. Prior to version 7.5.1, a…
-
High 8.6
Firecrawl Playwright Service SSRF Protection Bypass via Missing Post-Redirect Validation
Firecrawl version 2.8.0 and prior contain a server-side request forgery (SSRF) protection bypass vulnerability in the Playwright scraping service where network policy validation is applied only to the initial user-supplied URL and not to subsequent redirect d…
-
Medium 6.8
Roadiz has Server-Side Request Forgery (SSRF) in roadiz/documents
Roadiz is a polymorphic content management system based on a node system that can handle many types of services. A vulnerability in roadiz/documents prior to versions 2.7.9, 2.6.28, 2.5.44, and 2.3.42 allows an authenticated attacker to read any file on the s…
-
Low 3.1
Org.keycloak.protocol.oidc.grants: org.keycloak.services.managers: keycloak: server-side request forgery via oidc token endpoint manipulation
A flaw was found in Keycloak. An authenticated attacker can perform Server-Side Request Forgery (SSRF) by manipulating the `client_session_host` parameter during refresh token requests. This occurs when a Keycloak client is configured to use the `backchannel.…
-
Medium 6.6
Saloon is vulnerable to SSRF and credential leakage via absolute URL in endpoint overriding base URL
Saloon is a PHP library that gives users tools to build API integrations and SDKs. Prior to version 4.0.0, when building the request URL, Saloon combined the connector's base URL with the request endpoint. If the endpoint was a valid absolute URL, the code us…
-
Medium 5.4
IBM InfoSphere Information Server is vulnerable to server-side request forgery
IBM InfoSphere Information Server 11.7.0.0 through 11.7.1.6 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating…
-
Medium 5.4
IBM InfoSphere Information Server is vulnerable to server-side request forgery
IBM InfoSphere Information Server 11.7.0.0 through 11.7.1.6 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating…
-
Medium 5.4
IBM WebSphere Application Server Liberty Server-Side Request Forgery
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.3 IBM WebSphere Application Server Liberty is vulnerable to server-side request forgery (SSRF). This may allow remote attacker to send unauthorized requests from the system, potentially leadin…
-
Medium 4.9
AVideo: Full-Read SSRF Through Unvalidated statsURL Parameter in plugin/Live/test.php
## Summary The `plugin/Live/test.php` endpoint accepts a URL via the `statsURL` parameter and fetches it server-side using `file_get_contents()`, `curl_exec()`, or `wget`, returning the full response content in the HTML output. The only validation is a trivia…
-
Medium 6.4
WordPress Contest Gallery plugin <= 28.1.2.1 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in Wasiliy Strecker / ContestGallery developer Contest Gallery contest-gallery allows Server Side Request Forgery.This issue affects Contest Gallery: from n/a through <= 28.1.2.1.
-
Medium 5.0
Drupal Canvas - Moderately critical - Server-side request forgery, Information disclosure - SA-CONTRIB-2026-017
Server-Side Request Forgery (SSRF) vulnerability in Drupal Drupal Canvas allows Server Side Request Forgery.This issue affects Drupal Canvas: from 0.0.0 before 1.1.1.
-
Medium 6.3
league/commonmark has an embed extension allowed_domains bypass
league/commonmark is a PHP Markdown parser. From version 2.3.0 to before version 2.8.2, the DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing hostname boundary assertion in the domain-matching regex. An attack…
-
High 7.1
Wallos: Incomplete fix for CVE-2026-30840 - SSRF in AI and notification endpoints bypass ssrf_helper.php
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the patch introduced in commit e8a513591 (CVE-2026-30840) added SSRF protection to notification test endpoints but left three additional attack surfaces unprotected…
-
High 7.7
Wallos: SSRF Bypass - Incomplete Fix for CVE-2026-30839/30840
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the SSRF fix applied in version 4.6.2 for CVE-2026-30839 and CVE-2026-30840 is incomplete. The validate_webhook_url_for_ssrf() protection was added to the test* not…
-
High 8.3
Wallos: SSRF via HTTP Proxy Environment Variable
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY and HTTPS_PROXY environment variables without validation, enabling SSRF via proxy hijacking. The server perform…
-
Critical 9.1
LoLLMs WEBUI has unauthenticated Server-Side Request Forgery (SSRF) in /api/proxy endpoint
LoLLMs WEBUI provides the Web user interface for Lord of Large Language and Multi modal Systems. A critical Server-Side Request Forgery (SSRF) vulnerability has been identified in all known existing versions of `lollms-webui`. The `@router.post("/api/proxy")`…
-
Medium 6.4
Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `pict…