Bytebase before 3.16.0 Authorization Bypass via UpdateIssueComment

{
  "id": "27938dfd4a363e869d60c3757a02f020b855da345eac2f99baad3426768c5b94",
  "url": "https://osv.dev/vulnerability/CVE-2026-115321",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bytebase before 3.16.0 Authorization Bypass via UpdateIssueComment",
    "summary": "Bytebase before 3.16.0 contains an authorization bypass vulnerability in the UpdateIssueComment handler that allows low-privileged project users to modify comments in other projects by supplying a foreign comment UID. Attackers with any project role, including Project Viewer, can set their own project's issue as parent and reference another project's comment UID to overwrite comments they cannot access.",
    "evidence": "osv:CVE-2026-115321",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-115321",
      "aliases": [
        "CVE-2026-115321"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bytebase/bytebase",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c8ccd583cc662448eb6cfd12adba3a3bd6f47ebb"
                },
                {
                  "fixed": "270e25529731b59988b58f4a4b3bda431c748bc9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.16.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "270e25529731b59988b58f4a4b3bda431c748bc9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c8ccd583cc662448eb6cfd12adba3a3bd6f47ebb"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "3.16.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.15.0",
            "3.14.0",
            "3.13.0",
            "3.12.1",
            "3.12.0",
            "3.11.1",
            "3.11.0",
            "3.10.1",
            "3.10.0",
            "3.9.2",
            "3.9.1",
            "3.9.0",
            "3.8.1",
            "3.8.0",
            "3.7.1",
            "3.7.0",
            "3.6.2",
            "3.6.1",
            "3.6.0",
            "3.5.2",
            "3.5.1",
            "3.4.1",
            "v3.4.0",
            "3.3.1",
            "3.1.2",
            "3.1.0",
            "3.0.1",
            "3.0.0",
            "2.22.3",
            "2.21.0",
            "2.20.0",
            "2.19.0",
            "2.18.0",
            "2.17.0",
            "2.15.0",
            "2.14.0",
            "2.13.0",
            "2.11.1",
            "2.11.0",
            "2.10.0",
            "2.9.1",
            "2.9.0",
            "2.8.0",
            "2.7.0",
            "2.4.0",
            "v1.0.0",
            "0.10.0",
            "0.9.0",
            "0.8.1",
            "0.8.0",
            "0.7.2",
            "0.7.0",
            "0.6.0",
            "0.5.0",
            "0.4.1",
            "0.4.0",
            "0.3.0",
            "0.2.1",
            "0.2.0",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115321.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.931930095Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115321.json",
        "https://github.com/bytebase/bytebase/releases/tag/3.16.0",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-115321",
        "https://www.vulncheck.com/advisories/bytebase-before-3.16.0-authorization-bypass-via-updateissuecomment",
        "https://github.com/bytebase/bytebase/issues/19369",
        "https://github.com/bytebase/bytebase/commit/270e25529731b59988b58f4a4b3bda431c748bc9",
        "https://github.com/bytebase/bytebase/pull/19552",
        "https://github.com/bytebase/bytebase",
        "https://github.com/bytebase/bytebase/blob/3.15.1/backend/api/v1/issue_service.go#L1116"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115321.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115321",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490608,
  "published_at": "2026-10-22T10:57:40.982+00:00"
}