CWE-918
AllowedServer-Side Request Forgery (SSRF)
Abstraction: Base · Status: Incomplete
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.
5864 vulnerabilities reference this CWE, most recent first.
GHSA-4CHG-4752-W88R
Vulnerability from github – Published: 2026-07-13 17:58 – Updated: 2026-07-13 17:58Summary
An unauthenticated attacker can coerce the server into issuing HTTP requests to an attacker-chosen host by spoofing the X Forwarded-Host (and X-Forwarded-Proto) request headers. The forwarded host is used, without validation, to build the URL that server_info_update() fetches with cURL, resulting in a Server-Side Request Forgery (SSRF) that requires no authentication.
Affected component
- File:
includes/ini.php— functionserver_info_update()(cURL sink) - File:
vendor/vinades/nukeviet/Core/Server.php—standardizeHost()and the forwarded-header handling in the constructor (source of the tainted host) - Trigger:
POSTrequest containing the field__serverInfoUpdate=1, handled early inincludes/ini.phpbefore any authentication.
Details
NukeViet\Core\Server derives original_host / original_protocol from the X-Forwarded-Host / X-Forwarded-Proto headers and exposes them via getOriginalHost() / getOriginalProtocol(). These values are attacker-controlled and were not validated against the site's configured domains (my_domains).
In server_info_update() the tainted host and scheme are concatenated directly into a cURL URL:
$proto = $nv_Server->getOriginalProtocol(); // from X-Forwarded-Proto
$host = $nv_Server->getOriginalHost(); // from X-Forwarded-Host
$ch = curl_init($proto . '://' . $host . NV_BASE_SITEURL . 'index.php?response_headers_detect=1');
curl_exec($ch);
Two factors made this reliably reachable:
- The
__serverInfoUpdatehandler runs very early inincludes/ini.php, before authentication, so the sink is reachable pre-auth. - The host sanitiser
standardizeHost()stripped a trailing port only with the regex(\:[0-9]+)$, which is bypassed by appending a slash (e.g.127.0.0.1:8081/): the string no longer ends in:digits, so the port survives and an arbitraryhost:portreaches the cURL call.
Proof of Concept
POST /index.php HTTP/1.1
Host: <victim>
X-Forwarded-Proto: http
X-Forwarded-Host: <attacker-controlled-host>:<port>/
Content-Type: application/x-www-form-urlencoded
Content-Length: 20
__serverInfoUpdate=1
The server then issues a request to the attacker-supplied host, confirmed via an out-of-band interaction (DNS + HTTP) on a collaborator endpoint.
Impact
The SSRF is blind, HEAD-only, and uses a fixed request path (…/index.php?response_headers_detect=1):
- The fetched response is stored server-side in the
config_inicache and is not reflected to the attacker, so internal data cannot be exfiltrated directly. - Because the path is fixed and not attacker-controlled, cloud metadata endpoints (e.g.
169.254.169.254/latest/meta-data/...) cannot be reached, andgopher:///dict://request smuggling cannot inject arbitrary payloads.
What an attacker can do: unauthenticated internal host/port discovery (connection success/timing, with the port reachable through the regex bypass), and poisoning of the cached server_headers (the SSRF target's response headers are stored and applied to the site).
Severity
Rated High rather than Critical, because the blind + fixed-path + HEAD design of the sink prevents data exfiltration, cloud credential theft, and internal RCE.
- CVSS v3.1 Base Score: 7.2 (High)
- Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Weakness
- Primary: CWE-918: Server-Side Request Forgery (SSRF)
- Contributing: CWE-20 (Improper Input Validation), CWE-644 (Improper Neutralization of HTTP Headers used by downstream components / trusting
X-Forwarded-*).
Remediation
Fixed by validating and normalising the forwarded values at the source and gating the request before the sink:
standardizeHost()now extracts the host withparse_url()(defeats the:port/bypass) and lower-cases it.X-Forwarded-Protois restricted to a{http, https}allow-list and falls back to the real server protocol otherwise.X-Forwarded-Portis validated as numeric and within range.- The incoming host is checked against
my_domainsbeforeincludes/ini.phpis reached; non-matching hosts are rejected/redirected, andserver_info_update()additionally re-validates its target host againstmy_domains(defense in depth).
Workaround
Configure the reverse proxy / web server to strip or override client-supplied X-Forwarded-Host, X-Forwarded-Proto, and X-Forwarded-Port headers, and ensure my_domains is configured with the site's canonical domain(s).
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "nukeviet/nukeviet"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.6.00"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-55372"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-13T17:58:44Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "## Summary\n\nAn unauthenticated attacker can coerce the server into issuing HTTP requests to an attacker-chosen host by spoofing the `X Forwarded-Host` (and `X-Forwarded-Proto`) request headers. The forwarded host is used, without validation, to build the URL that `server_info_update()` fetches with cURL, resulting in a Server-Side Request Forgery (SSRF) that requires no authentication.\n\n## Affected component\n\n- File: `includes/ini.php` \u2014 function `server_info_update()` (cURL sink)\n- File: `vendor/vinades/nukeviet/Core/Server.php` \u2014 `standardizeHost()` and the forwarded-header handling in the constructor (source of the tainted host)\n- Trigger: `POST` request containing the field `__serverInfoUpdate=1`, handled early in `includes/ini.php` before any authentication.\n\n## Details\n\n`NukeViet\\Core\\Server` derives `original_host` / `original_protocol` from the `X-Forwarded-Host` / `X-Forwarded-Proto` headers and exposes them via `getOriginalHost()` / `getOriginalProtocol()`. These values are attacker-controlled and were not validated against the site\u0027s configured domains (`my_domains`).\n\nIn `server_info_update()` the tainted host and scheme are concatenated directly into a cURL URL:\n\n```php\n$proto = $nv_Server-\u003egetOriginalProtocol(); // from X-Forwarded-Proto\n$host = $nv_Server-\u003egetOriginalHost(); // from X-Forwarded-Host\n$ch = curl_init($proto . \u0027://\u0027 . $host . NV_BASE_SITEURL . \u0027index.php?response_headers_detect=1\u0027);\ncurl_exec($ch);\n```\n\nTwo factors made this reliably reachable:\n\n1. The `__serverInfoUpdate` handler runs very early in `includes/ini.php`, before authentication, so the sink is reachable pre-auth.\n2. The host sanitiser `standardizeHost()` stripped a trailing port only with the regex `(\\:[0-9]+)$`, which is bypassed by appending a slash (e.g. `127.0.0.1:8081/`): the string no longer ends in `:digits`, so the port survives and an arbitrary `host:port` reaches the cURL call.\n\n## Proof of Concept\n\n```http\nPOST /index.php HTTP/1.1\nHost: \u003cvictim\u003e\nX-Forwarded-Proto: http\nX-Forwarded-Host: \u003cattacker-controlled-host\u003e:\u003cport\u003e/\nContent-Type: application/x-www-form-urlencoded\nContent-Length: 20\n\n__serverInfoUpdate=1\n```\n\nThe server then issues a request to the attacker-supplied host, confirmed via an out-of-band interaction (DNS + HTTP) on a collaborator endpoint.\n\n## Impact\n\nThe SSRF is **blind**, **HEAD-only**, and uses a **fixed request path** (`\u2026/index.php?response_headers_detect=1`):\n\n- The fetched response is stored server-side in the `config_ini` cache and is **not reflected** to the attacker, so internal data cannot be exfiltrated directly.\n- Because the path is fixed and not attacker-controlled, cloud metadata endpoints (e.g. `169.254.169.254/latest/meta-data/...`) cannot be reached, and `gopher://` / `dict://` request smuggling cannot inject arbitrary payloads.\n\nWhat an attacker **can** do: unauthenticated internal host/port discovery (connection success/timing, with the port reachable through the regex bypass), and poisoning of the cached `server_headers` (the SSRF target\u0027s response headers are stored and applied to the site).\n\n## Severity\n\nRated **High** rather than Critical, because the blind + fixed-path + HEAD design of the sink prevents data exfiltration, cloud credential theft, and internal RCE.\n\n- CVSS v3.1 Base Score: **7.2 (High)**\n- Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`\n\n## Weakness\n\n- Primary: **CWE-918: Server-Side Request Forgery (SSRF)**\n- Contributing: CWE-20 (Improper Input Validation), CWE-644 (Improper Neutralization of HTTP Headers used by downstream components / trusting `X-Forwarded-*`).\n\n## Remediation\n\nFixed by validating and normalising the forwarded values at the source and gating the request before the sink:\n\n- `standardizeHost()` now extracts the host with `parse_url()` (defeats the `:port/` bypass) and lower-cases it.\n- `X-Forwarded-Proto` is restricted to a `{http, https}` allow-list and falls back to the real server protocol otherwise.\n- `X-Forwarded-Port` is validated as numeric and within range.\n- The incoming host is checked against `my_domains` before `includes/ini.php` is reached; non-matching hosts are rejected/redirected, and `server_info_update()` additionally re-validates its target host against `my_domains` (defense in depth).\n\n## Workaround\n\nConfigure the reverse proxy / web server to strip or override client-supplied `X-Forwarded-Host`, `X-Forwarded-Proto`, and `X-Forwarded-Port` headers, and ensure `my_domains` is configured with the site\u0027s canonical domain(s).",
"id": "GHSA-4chg-4752-w88r",
"modified": "2026-07-13T17:58:44Z",
"published": "2026-07-13T17:58:44Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/nukeviet/nukeviet/security/advisories/GHSA-4chg-4752-w88r"
},
{
"type": "PACKAGE",
"url": "https://github.com/nukeviet/nukeviet"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "NukeViet: Pre-authentication SSRF via X-Forwarded-Host"
}
GHSA-4CHG-642F-QR6P
Vulnerability from github – Published: 2022-05-24 19:12 – Updated: 2022-05-24 19:12The vRealize Operations Manager API (8.x prior to 8.5) contains a Server Side Request Forgery in an end point. An unauthenticated malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack leading to information disclosure.
{
"affected": [],
"aliases": [
"CVE-2021-22027"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-08-30T18:15:00Z",
"severity": "HIGH"
},
"details": "The vRealize Operations Manager API (8.x prior to 8.5) contains a Server Side Request Forgery in an end point. An unauthenticated malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack leading to information disclosure.",
"id": "GHSA-4chg-642f-qr6p",
"modified": "2022-05-24T19:12:29Z",
"published": "2022-05-24T19:12:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22027"
},
{
"type": "WEB",
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0018.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4F2V-Q2VH-V8HC
Vulnerability from github – Published: 2026-03-27 18:31 – Updated: 2026-03-27 18:31A 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 ImageContent leads to server-side request forgery. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
{
"affected": [],
"aliases": [
"CVE-2026-4964"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-27T17:16:31Z",
"severity": "MODERATE"
},
"details": "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 ImageContent leads to server-side request forgery. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.",
"id": "GHSA-4f2v-q2vh-v8hc",
"modified": "2026-03-27T18:31:28Z",
"published": "2026-03-27T18:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4964"
},
{
"type": "WEB",
"url": "https://gist.github.com/YLChen-007/fde4d5ed6ac4aa876f73f8954c6214da"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.353841"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.353841"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.777645"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-4F5X-V9CJ-7FFR
Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information due to a server-side request forgery (SSRF) vulnerability.
{
"affected": [],
"aliases": [
"CVE-2026-17631"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-04T17:16:55Z",
"severity": "MODERATE"
},
"details": "IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information due to a server-side request forgery (SSRF) vulnerability.",
"id": "GHSA-4f5x-v9cj-7ffr",
"modified": "2026-09-04T18:31:31Z",
"published": "2026-09-04T18:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17631"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7285644"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4F7Q-XQ4J-FMJ8
Vulnerability from github – Published: 2022-05-24 19:13 – Updated: 2022-05-24 19:13Server Side Request Forgery (SSRF) vulnerability exists in owncloud/user_ldap < 0.15.4 in the settings of the user_ldap app. Administration role is necessary for exploitation.
{
"affected": [],
"aliases": [
"CVE-2021-40537"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-08T18:15:00Z",
"severity": "MODERATE"
},
"details": "Server Side Request Forgery (SSRF) vulnerability exists in owncloud/user_ldap \u003c 0.15.4 in the settings of the user_ldap app. Administration role is necessary for exploitation.",
"id": "GHSA-4f7q-xq4j-fmj8",
"modified": "2022-05-24T19:13:19Z",
"published": "2022-05-24T19:13:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40537"
},
{
"type": "WEB",
"url": "https://owncloud.com/security-advisories/cve-2021-40537"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4F94-FQ23-HCH4
Vulnerability from github – Published: 2026-03-25 18:31 – Updated: 2026-03-26 21:31Server-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.
{
"affected": [],
"aliases": [
"CVE-2026-24964"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-25T17:16:38Z",
"severity": "MODERATE"
},
"details": "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 \u003c= 28.1.2.1.",
"id": "GHSA-4f94-fq23-hch4",
"modified": "2026-03-26T21:31:24Z",
"published": "2026-03-25T18:31:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24964"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Plugin/contest-gallery/vulnerability/wordpress-contest-gallery-plugin-28-1-2-1-server-side-request-forgery-ssrf-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4F9M-6H5H-CG9V
Vulnerability from github – Published: 2022-05-24 19:12 – Updated: 2022-05-24 19:12An SSRF vulnerability in Gotenberg through 6.2.1 exists in the remote URL to PDF conversion, which results in a remote attacker being able to read local files or fetch intranet resources.
{
"affected": [],
"aliases": [
"CVE-2020-14160"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-08-26T11:15:00Z",
"severity": "HIGH"
},
"details": "An SSRF vulnerability in Gotenberg through 6.2.1 exists in the remote URL to PDF conversion, which results in a remote attacker being able to read local files or fetch intranet resources.",
"id": "GHSA-4f9m-6h5h-cg9v",
"modified": "2022-05-24T19:12:19Z",
"published": "2022-05-24T19:12:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14160"
},
{
"type": "WEB",
"url": "https://github.com/gotenberg/gotenberg/issues/215"
},
{
"type": "WEB",
"url": "https://github.com/gotenberg/gotenberg/pull/319"
},
{
"type": "WEB",
"url": "https://github.com/thecodingmachine/gotenberg/releases"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4FCW-PQ4R-F4Q7
Vulnerability from github – Published: 2021-05-07 15:54 – Updated: 2021-05-05 19:53The Spinnaker template resolution functionality is vulnerable to Server-Side Request Forgery (SSRF), which allows an attacker to send requests on behalf of Spinnaker potentially leading to sensitive data disclosure.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.netflix.spinnaker.orca:orca-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.7.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-9298"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2021-05-05T19:53:13Z",
"nvd_published_at": "2020-08-28T15:15:00Z",
"severity": "HIGH"
},
"details": "The Spinnaker template resolution functionality is vulnerable to Server-Side Request Forgery (SSRF), which allows an attacker to send requests on behalf of Spinnaker potentially leading to sensitive data disclosure.",
"id": "GHSA-4fcw-pq4r-f4q7",
"modified": "2021-05-05T19:53:13Z",
"published": "2021-05-07T15:54:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-9298"
},
{
"type": "WEB",
"url": "https://github.com/spinnaker/orca/pull/3706/commits/4f3c07da8fcacd67bb1984aef11b2066f2c0d11c"
},
{
"type": "WEB",
"url": "https://github.com/Netflix/security-bulletins/blob/master/advisories/nflx-2020-003.md"
},
{
"type": "WEB",
"url": "https://github.com/spinnaker/orca/releases/tag/v8.7.0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Server-Side Request Forgery in Spinnaker Orca"
}
GHSA-4FF6-858J-R822
Vulnerability from github – Published: 2025-01-16 23:08 – Updated: 2025-01-17 15:41Impact
Gomatrixserverlib is vulnerable to server-side request forgery, serving content from a private network it can access, under certain conditions.
Patches
c4f1e01eab0dd435709ad15463ed38a079ad6128 fixes this issue.
Workarounds
Use a local firewall to limit the network segments and hosts the service using gomatrixserverlib can access.
References
N/A
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 0.0.0-20250106190028-bf86bc98b879"
},
"package": {
"ecosystem": "Go",
"name": "github.com/matrix-org/gomatrixserverlib"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0.0-20250116181547-c4f1e01eab0d"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-52594"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2025-01-16T23:08:32Z",
"nvd_published_at": "2025-01-16T19:15:28Z",
"severity": "MODERATE"
},
"details": "### Impact\nGomatrixserverlib is vulnerable to server-side request forgery, serving content from a private network it can access, under certain conditions.\n\n### Patches\n\nc4f1e01eab0dd435709ad15463ed38a079ad6128 fixes this issue.\n\n\n### Workarounds\nUse a local firewall to limit the network segments and hosts the service using gomatrixserverlib can access.\n\n### References\nN/A\n",
"id": "GHSA-4ff6-858j-r822",
"modified": "2025-01-17T15:41:23Z",
"published": "2025-01-16T23:08:32Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/matrix-org/gomatrixserverlib/security/advisories/GHSA-4ff6-858j-r822"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-52594"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/gomatrixserverlib/commit/c4f1e01eab0dd435709ad15463ed38a079ad6128"
},
{
"type": "PACKAGE",
"url": "https://github.com/matrix-org/gomatrixserverlib"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/vuln/GO-2025-3396"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Gomatrixserverlib Server-Side Request Forgery (SSRF) on redirects and federation"
}
GHSA-4FG7-F244-3J49
Vulnerability from github – Published: 2026-05-19 14:44 – Updated: 2026-06-09 11:56Summary
Multiple functions conduct substring-only matching to validate hostnames to which basic authorization should be sent. An attacker can append the matched substrings to an attacker-controlled endpoint and capture authentication.
Details
api/services/website/cacheAddress.js, api/apps/haxcms/lib/JOSHelpers.js, and api/apps/haxcms/convert/elmslnToSite.js use similar logic to check for hard-coded site names. However, the logic only looks for the substring to be included in the user-controlled string, allowing an attacker to craft an API call and extract the credentials intended for the hard-coded domains.
PoC
Making API calls to an affected endpoint will result in credential theft. The attacker-controlled domains in these proofs of concept are cloudflared tunnels, protecting the production credentials from unencrypted exposure.
cacheAddress.js:
elmslnToSite.js:
JOSHelpers.js:
Impact
This vulnerability allows internal data, including secrets, to be exfiltrated to an attacker-controlled domain. Credentials were confirmed with the maintainer to grant access to unreleased LMS content on subsequent systems; out of scope for PoC.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "@haxtheweb/open-apis"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "26.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-46391"
],
"database_specific": {
"cwe_ids": [
"CWE-183",
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-19T14:44:46Z",
"nvd_published_at": "2026-06-05T19:16:33Z",
"severity": "HIGH"
},
"details": "### Summary\nMultiple functions conduct substring-only matching to validate hostnames to which basic authorization should be sent. An attacker can append the matched substrings to an attacker-controlled endpoint and capture authentication.\n\n### Details\n[api/services/website/cacheAddress.js](https://github.com/haxtheweb/open-apis/blob/ff694ce91442c39ae1a78dc21e9ce50546aa207a/api/services/website/cacheAddress.js#L21), [api/apps/haxcms/lib/JOSHelpers.js](https://github.com/haxtheweb/open-apis/blob/ff694ce91442c39ae1a78dc21e9ce50546aa207a/api/apps/haxcms/lib/JOSHelpers.js#L26), and [api/apps/haxcms/convert/elmslnToSite.js](https://github.com/haxtheweb/open-apis/blob/ff694ce91442c39ae1a78dc21e9ce50546aa207a/api/apps/haxcms/convert/elmslnToSite.js#L37) use similar logic to check for hard-coded site names. However, the logic only looks for the substring to be included in the user-controlled string, allowing an attacker to craft an API call and extract the credentials intended for the hard-coded domains.\n\n### PoC\nMaking API calls to an affected endpoint will result in credential theft. The attacker-controlled domains in these proofs of concept are `cloudflared` tunnels, protecting the production credentials from unencrypted exposure.\n\ncacheAddress.js:\n\u003cimg width=\"3404\" height=\"1656\" alt=\"ssrf_cred_theft\" src=\"https://github.com/user-attachments/assets/0a87cef5-3c4d-450a-8bb7-35123d5f621b\" /\u003e\n\nelmslnToSite.js:\n\u003cimg width=\"3409\" height=\"1641\" alt=\"theft2\" src=\"https://github.com/user-attachments/assets/bede82cc-a613-4fc7-bbf6-76166af784f5\" /\u003e\n\nJOSHelpers.js:\n\u003cimg width=\"3407\" height=\"1597\" alt=\"theft3\" src=\"https://github.com/user-attachments/assets/4f3f8bee-443e-4b22-9d41-eb9726619d36\" /\u003e\n\n### Impact\nThis vulnerability allows internal data, including secrets, to be exfiltrated to an attacker-controlled domain. Credentials were confirmed with the maintainer to grant access to unreleased LMS content on subsequent systems; out of scope for PoC.",
"id": "GHSA-4fg7-f244-3j49",
"modified": "2026-06-09T11:56:37Z",
"published": "2026-05-19T14:44:46Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/haxtheweb/issues/security/advisories/GHSA-4fg7-f244-3j49"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46391"
},
{
"type": "PACKAGE",
"url": "https://github.com/haxtheweb/issues"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "HAX open-apis: Credential Theft via Server-Side Request Forgery (SSRF) in open-apis"
}
No mitigation information available for this CWE.
CAPEC-664: Server Side Request Forgery
An adversary exploits improper input validation by submitting maliciously crafted input to a target application running on a server, with the goal of forcing the server to make a request either to itself, to web services running in the server’s internal network, or to external third parties. If successful, the adversary’s request will be made with the server’s privilege level, bypassing its authentication controls. This ultimately allows the adversary to access sensitive data, execute commands on the server’s network, and make external requests with the stolen identity of the server. Server Side Request Forgery attacks differ from Cross Site Request Forgery attacks in that they target the server itself, whereas CSRF attacks exploit an insecure user authentication mechanism to perform unauthorized actions on the user's behalf.