Vulnerability-Lookup

GHSA-FWHW-CHW4-GH37

Vulnerability from github – Published: 2026-02-02 09:30 – Updated: 2026-02-02 21:23

Summary

Keycloak Server-Side Request Forgery (SSRF) vulnerability

Details

A flaw was found in Keycloak’s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services.

Severity ?

2.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-parent"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "26.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-1518"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-02T21:23:18Z",
    "nvd_published_at": "2026-02-02T08:16:06Z",
    "severity": "LOW"
  },
  "details": "A flaw was found in Keycloak\u2019s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services.",
  "id": "GHSA-fwhw-chw4-gh37",
  "modified": "2026-02-02T21:23:18Z",
  "published": "2026-02-02T09:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1518"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-1518"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433727"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak Server-Side Request Forgery (SSRF) vulnerability"
}

CVE-2026-1518 (GCVE-0-2026-1518)

Vulnerability from cvelistv5 – Published: 2026-02-02 07:17 – Updated: 2026-02-02 14:07

Title

Keycloak: blind server-side request forgery (ssrf) via ciba backchannel notification endpoint in keycloak

Summary

A flaw was found in Keycloak’s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services.

Severity ?

2.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2026-1518	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2433727	issue-trackingx_refsource_REDHAT

Impacted products

Vendor

Product

Version

Red Hat

Red Hat Build of Keycloak

cpe:/a:redhat:build_keycloak:

	Red Hat	Red Hat Build of Keycloak	cpe:/a:redhat:build_keycloak:
	Red Hat	Red Hat Build of Keycloak	cpe:/a:redhat:build_keycloak:

Credits

Red Hat would like to thank Patrick Smith for reporting this issue.

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-1518",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-02T14:03:51.798430Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-02T14:07:02.915Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:"
          ],
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          "packageName": "rhbk/keycloak-operator-bundle",
          "product": "Red Hat Build of Keycloak",
          "vendor": "Red Hat"
        },
        {
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          "cpes": [
            "cpe:/a:redhat:build_keycloak:"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-rhel9",
          "product": "Red Hat Build of Keycloak",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-rhel9-operator",
          "product": "Red Hat Build of Keycloak",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank Patrick Smith for reporting this issue."
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      ],
      "datePublic": "2026-01-28T00:00:00.000Z",
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        }
      ],
      "metrics": [
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            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Low"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 2.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
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      ],
      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-918",
              "description": "Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-02T07:17:46.557Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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      },
      "references": [
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-1518"
        },
        {
          "name": "RHBZ#2433727",
          "tags": [
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            "x_refsource_REDHAT"
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          "time": "2026-01-28T08:06:13.712000+00:00",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-01-28T00:00:00+00:00",
          "value": "Made public."
        }
      ],
      "title": "Keycloak: blind server-side request forgery (ssrf) via ciba backchannel notification endpoint in keycloak",
      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate this issue, restrict administrative access to Keycloak instances. Ensure that only trusted and authorized personnel have the necessary privileges to configure client settings, including the backchannel_client_notification_endpoint. This limits the ability of an attacker to manipulate the endpoint for SSRF attacks."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-918: Server-Side Request Forgery (SSRF)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
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    "datePublished": "2026-02-02T07:17:46.557Z",
    "dateReserved": "2026-01-28T08:08:15.419Z",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-FWHW-CHW4-GH37

CVE-2026-1518 (GCVE-0-2026-1518)

Tags

Sightings

Nomenclature