GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
Common Weakness Enumeration

CWE-918

Allowed

Server-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.

5695 vulnerabilities reference this CWE, most recent first.

GHSA-QMG7-8PR5-GPF8

Vulnerability from github – Published: 2026-07-14 21:32 – Updated: 2026-07-14 21:32
VLAI
Details

ColdFusion is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in a Security feature bypass. A low-privileged attacker could leverage this vulnerability to bypass security measures and gain unauthorized read access. Exploitation of this issue does not require user interaction. Scope is changed.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-48332"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-14T21:16:59Z",
    "severity": "HIGH"
  },
  "details": "ColdFusion is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in a Security feature bypass. A low-privileged attacker could leverage this vulnerability to bypass security measures and gain unauthorized read access. Exploitation of this issue does not require user interaction. Scope is changed.",
  "id": "GHSA-qmg7-8pr5-gpf8",
  "modified": "2026-07-14T21:32:23Z",
  "published": "2026-07-14T21:32:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48332"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/coldfusion/apsb26-82.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QMGX-J96G-4428

Vulnerability from github – Published: 2024-03-15 12:30 – Updated: 2026-02-02 15:57
VLAI
Summary
SSRF vulnerability using the Aegis DataBinding in Apache CXF
Details

A SSRF vulnerability using the Aegis DataBinding in versions of Apache CXF before 4.0.4, 3.6.3 and 3.5.8 allows an attacker to perform SSRF style attacks on webservices that take at least one parameter of any type. Users of other data bindings (including the default databinding) are not impacted.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.cxf:cxf-rt-databinding-aegis"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.cxf:cxf-rt-databinding-aegis"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.6.0"
            },
            {
              "fixed": "3.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.cxf:cxf-rt-databinding-aegis"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-28752"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-03-15T19:43:50Z",
    "nvd_published_at": "2024-03-15T11:15:09Z",
    "severity": "CRITICAL"
  },
  "details": "A SSRF vulnerability using the Aegis DataBinding in versions of Apache CXF before 4.0.4, 3.6.3 and 3.5.8 allows an attacker to perform SSRF style attacks on webservices that take at least one parameter of any type. Users of other data bindings (including the default databinding) are not impacted.",
  "id": "GHSA-qmgx-j96g-4428",
  "modified": "2026-02-02T15:57:47Z",
  "published": "2024-03-15T12:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28752"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/cxf/commit/d0baeb3ee64c6d7c883bd2f5c4cb0de6b0b5f463"
    },
    {
      "type": "WEB",
      "url": "https://cxf.apache.org/security-advisories.data/CVE-2024-28752.txt"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/cxf"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20240517-0001"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2024/03/14/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "SSRF vulnerability using the Aegis DataBinding in Apache CXF"
}

GHSA-QMHR-X227-7HGF

Vulnerability from github – Published: 2026-08-11 15:32 – Updated: 2026-08-12 21:31
VLAI
Details

An issue in usememos through v0.30.0 allows a remote authenticated attacker to perform Server-Side Request Forgery (SSRF) via the Webhook validation mechanism in internal/webhook/validate.go, by setting a webhook target to an internal address.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-51583"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-11T14:17:14Z",
    "severity": "HIGH"
  },
  "details": "An issue in usememos through v0.30.0 allows a remote authenticated attacker to perform Server-Side Request Forgery (SSRF) via the Webhook validation mechanism in internal/webhook/validate.go, by setting a webhook target to an internal address.",
  "id": "GHSA-qmhr-x227-7hgf",
  "modified": "2026-08-12T21:31:28Z",
  "published": "2026-08-11T15:32:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-51583"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/seiyaibuki0523/d8af15eb555808319a2633269a9ebb80"
    },
    {
      "type": "WEB",
      "url": "https://github.com/usememos/memos"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QMPQ-M6M5-57HH

Vulnerability from github – Published: 2024-11-29 06:35 – Updated: 2024-12-02 21:31
VLAI
Details

LinkStack 2.7.9 through 4.7.7 allows resources\views\components\favicon.blade.php link SSRF.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-35451"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-29T05:15:05Z",
    "severity": "MODERATE"
  },
  "details": "LinkStack 2.7.9 through 4.7.7 allows resources\\views\\components\\favicon.blade.php link SSRF.",
  "id": "GHSA-qmpq-m6m5-57hh",
  "modified": "2024-12-02T21:31:18Z",
  "published": "2024-11-29T06:35:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35451"
    },
    {
      "type": "WEB",
      "url": "https://datafarm.co.th/blog/CVE-2024-35451:-From-%28Authenticated%29-SSRF-to-Remote-Code-Execution"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QMRG-93C4-G93F

Vulnerability from github – Published: 2026-06-20 21:31 – Updated: 2026-06-20 21:31
VLAI
Details

AVideo through version 27.0 contains a server-side request forgery vulnerability in plugin/Live/test.php that allows authenticated administrators to read arbitrary URLs via the statsURL parameter, which lacks isSSRFSafeURL() validation and accepts requests to private IP ranges and cloud metadata endpoints. Attackers can exploit this by crafting requests to internal services, cloud metadata endpoints like 169.254.169.254, and localhost to retrieve sensitive information including IAM credentials, internal service responses, and network configuration details.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-56342"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-20T19:16:23Z",
    "severity": "MODERATE"
  },
  "details": "AVideo through version 27.0 contains a server-side request forgery vulnerability in plugin/Live/test.php that allows authenticated administrators to read arbitrary URLs via the statsURL parameter, which lacks isSSRFSafeURL() validation and accepts requests to private IP ranges and cloud metadata endpoints. Attackers can exploit this by crafting requests to internal services, cloud metadata endpoints like 169.254.169.254, and localhost to retrieve sensitive information including IAM credentials, internal service responses, and network configuration details.",
  "id": "GHSA-qmrg-93c4-g93f",
  "modified": "2026-06-20T21:31:22Z",
  "published": "2026-06-20T21:31:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-wxjx-r2j2-96fx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56342"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/avideo-server-side-request-forgery-in-live-test-php-via-statsurl-parameter"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/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-QMV4-FCFM-FVH5

Vulnerability from github – Published: 2025-11-18 15:30 – Updated: 2025-11-18 15:30
VLAI
Details

The Icon List Block – Add Icon-Based Lists with Custom Styles plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.2.1 via the fs_api_request function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. Only valid JSON objects are rendered in the response.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-12376"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-18T15:16:26Z",
    "severity": "MODERATE"
  },
  "details": "The Icon List Block \u2013 Add Icon-Based Lists with Custom Styles plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.2.1 via the fs_api_request function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. Only valid JSON objects are rendered in the response.",
  "id": "GHSA-qmv4-fcfm-fvh5",
  "modified": "2025-11-18T15:30:54Z",
  "published": "2025-11-18T15:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12376"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/icon-list-block/tags/1.2.0/bplugins_sdk/inc/Base/FSActivate.php#L168"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/438e2911-7663-44fe-883f-19ad29972aac?source=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-QMVM-WG96-H753

Vulnerability from github – Published: 2026-03-24 03:31 – Updated: 2026-03-24 03:31
VLAI
Details

A security vulnerability has been detected in DefaultFuction Jeson-Customer-Relationship-Management-System up to 1b4679c4d06b90d31dd521c2b000bfdec5a36e00. This affects an unknown function of the file /api/System.php of the component API Module. The manipulation of the argument url leads to server-side request forgery. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The identifier of the patch is f76e7123fe093b8675f88ec8f71725b0dd186310/98bd4eb07fa19d4f2c5228de6395580013c97476. It is suggested to install a patch to address this issue.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-4623"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-24T03:16:06Z",
    "severity": "MODERATE"
  },
  "details": "A security vulnerability has been detected in DefaultFuction Jeson-Customer-Relationship-Management-System up to 1b4679c4d06b90d31dd521c2b000bfdec5a36e00. This affects an unknown function of the file /api/System.php of the component API Module. The manipulation of the argument url leads to server-side request forgery. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The identifier of the patch is f76e7123fe093b8675f88ec8f71725b0dd186310/98bd4eb07fa19d4f2c5228de6395580013c97476. It is suggested to install a patch to address this issue.",
  "id": "GHSA-qmvm-wg96-h753",
  "modified": "2026-03-24T03:31:19Z",
  "published": "2026-03-24T03:31:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4623"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/issues/2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/issues/2#issue-4045330588"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/issues/2#issuecomment-4023480586"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/commit/f76e7123fe093b8675f88ec8f71725b0dd186310"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.352482"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.352482"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.775760"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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-QMW5-54CP-96W5

Vulnerability from github – Published: 2025-11-18 09:30 – Updated: 2025-11-18 09:30
VLAI
Details

The Local Syndication plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.5a via the url parameter in the [syndicate_local] shortcode. This is due to the use of wp_remote_get() instead of wp_safe_remote_get() which lacks protections against requests to internal/private IP addresses and localhost. This makes it possible for authenticated attackers, with Contributor-level access and above, to make web requests to arbitrary locations originating from the web application, which can be used to query and modify information from internal services, scan internal networks, and access resources that should not be accessible from external networks.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-12962"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-18T09:15:49Z",
    "severity": "MODERATE"
  },
  "details": "The Local Syndication plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.5a via the `url` parameter in the `[syndicate_local]` shortcode. This is due to the use of `wp_remote_get()` instead of `wp_safe_remote_get()` which lacks protections against requests to internal/private IP addresses and localhost. This makes it possible for authenticated attackers, with Contributor-level access and above, to make web requests to arbitrary locations originating from the web application, which can be used to query and modify information from internal services, scan internal networks, and access resources that should not be accessible from external networks.",
  "id": "GHSA-qmw5-54cp-96w5",
  "modified": "2025-11-18T09:30:52Z",
  "published": "2025-11-18T09:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12962"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/local-syndication/tags/1.5/local_syndication.php#L41"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/local-syndication/tags/1.5/local_syndication.php#L64"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/7774cdfd-622a-4608-9efd-273923a0d0aa?source=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-QP2P-M8V3-MGHG

Vulnerability from github – Published: 2022-10-14 12:00 – Updated: 2022-10-14 12:00
VLAI
Details

ClipperCMS 1.3.3 was discovered to contain a Server-Side Request Forgery (SSRF) via the rss_url_news parameter at /manager/index.php.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-41495"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-10-13T21:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "ClipperCMS 1.3.3 was discovered to contain a Server-Side Request Forgery (SSRF) via the rss_url_news parameter at /manager/index.php.",
  "id": "GHSA-qp2p-m8v3-mghg",
  "modified": "2022-10-14T12:00:17Z",
  "published": "2022-10-14T12:00:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41495"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jayus0821/insight/blob/master/ClipperCMS%20SSRF2.md"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QP4C-XG64-7C6X

Vulnerability from github – Published: 2026-03-12 14:51 – Updated: 2026-04-15 20:46
VLAI
Summary
@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch
Details

Impact

A Server-Side Request Forgery (SSRF) vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial client_id hostname against private IP ranges but does not apply the same validation after HTTP redirects.

The practical impact is limited. The attacker cannot read the response body from the internal request, cannot control request headers or method, and the feature must be explicitly enabled via an experimental flag that is off by default. Deployments that restrict allowedClientIdPatterns to specific trusted domains are not affected.

### Patches

Patched in @backstage/plugin-auth-backend version 0.27.1. The fix disables HTTP redirect following when fetching CIMD metadata documents.

### Workarounds

Disable the experimental CIMD feature by removing or setting auth.experimentalClientIdMetadataDocuments.enabled to false in your app-config. This is the default configuration. Alternatively, restrict allowedClientIdPatterns to specific trusted domains rather than using the default wildcard pattern.

### References

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@backstage/plugin-auth-backend"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.27.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32236"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-12T14:51:02Z",
    "nvd_published_at": "2026-03-12T19:16:18Z",
    "severity": "LOW"
  },
  "details": "### Impact                                                                                                                                                                         \n                                                           \n  A Server-Side Request Forgery (SSRF) vulnerability exists in `@backstage/plugin-auth-backend` when `auth.experimentalClientIdMetadataDocuments.enabled` is set to `true`. The CIMD \n  metadata fetch validates the initial `client_id` hostname against private IP ranges but does not apply the same validation after HTTP redirects.\n                          \n  The practical impact is limited. The attacker cannot read the response body from the internal request, cannot control request headers or method, and the feature must be explicitly\n   enabled via an experimental flag that is off by default. Deployments that restrict `allowedClientIdPatterns` to specific trusted domains are not affected.\n\n  ### Patches\n\n  Patched in `@backstage/plugin-auth-backend` version `0.27.1`. The fix disables HTTP redirect following when fetching CIMD metadata documents.\n\n  ### Workarounds\n\n  Disable the experimental CIMD feature by removing or setting `auth.experimentalClientIdMetadataDocuments.enabled` to `false` in your app-config. This is the default configuration.\n   Alternatively, restrict `allowedClientIdPatterns` to specific trusted domains rather than using the default wildcard pattern.\n\n  ### References\n\n  - [IETF Client ID Metadata Document draft](https://datatracker.ietf.org/doc/draft-ietf-oauth-client-id-metadata-document/)\n  - [MCP Authorization Specification - Client ID Metadata Documents](https://modelcontextprotocol.io/specification/2025-11-25/basic/authorization#client-id-metadata-documents)",
  "id": "GHSA-qp4c-xg64-7c6x",
  "modified": "2026-04-15T20:46:59Z",
  "published": "2026-03-12T14:51:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-qp4c-xg64-7c6x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32236"
    },
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/commit/17038abf2dfdb4abc08a59b1c95af39851de0e07"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/backstage/backstage"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch"
}

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.