Inefficient Regular Expression Complexity in GitLab

{
  "id": "84e464b18e5c32e506b702879668302c6d250150699c9f431de4cba87d5baa05",
  "url": "https://osv.dev/vulnerability/CVE-2023-6736",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Inefficient Regular Expression Complexity in GitLab",
    "summary": "An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.",
    "evidence": "osv:CVE-2023-6736",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-6736",
      "aliases": [
        "BIT-gitlab-2023-6736",
        "CVE-2023-6736"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1bbe39452664021af90851aef8527ce5e850343e"
                },
                {
                  "fixed": "c8f3448a2f0cfb3c812fc4619e0f16bc3feb133b"
                },
                {
                  "introduced": "1e912d57d5a8f1135f4d41e25469069790134d41"
                },
                {
                  "fixed": "39213e8fab4a70aa7cf64bb1c75012bb11fd7b15"
                },
                {
                  "introduced": "76326ae8b898b38c8217ad037ed7122be00e62f0"
                },
                {
                  "last_affected": "76326ae8b898b38c8217ad037ed7122be00e62f0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.3.0"
                      },
                      {
                        "fixed": "16.7.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "16.8.0"
                      },
                      {
                        "fixed": "16.8.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:16.9.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "16.9.0"
                      },
                      {
                        "last_affected": "16.9.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "16.9.0",
            "v16.9.0-ee",
            "v16.8.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-6736.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.499016010Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6736.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-6736",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/435036",
        "https://hackerone.com/reports/2269023"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1333"
        ],
        "cna_assigner": "GitLab",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6736.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-6736",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497536,
  "published_at": "2024-02-07T22:02:30.947+00:00"
}