{"id":"GHSA-9528-x887-j2fp","summary":"OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication","details":"## Summary\n\nNextcloud Talk webhook signature failures were not throttled even though the integration relies on an operator-configured shared secret that may be weak.\n\n## Impact\n\nAn attacker who could reach the webhook endpoint could brute-force weak secrets online and then forge inbound webhook events.\n\n## Affected Component\n\n`extensions/nextcloud-talk/src/monitor.ts`\n\n## Fixed Versions\n\n- Affected: `\u003c= 2026.3.24`\n- Patched: `\u003e= 2026.3.28`\n- Latest stable `2026.3.28` contains the fix.\n\n## Fix\n\nFixed by commit `e403decb6e` (`nextcloud-talk: throttle repeated webhook auth failures`).\n\nOpenClaw thanks @AntAISecurityLab for reporting.","aliases":["CVE-2026-33580"],"modified":"2026-04-06T23:12:30.461473Z","published":"2026-03-31T23:59:17Z","database_specific":{"cwe_ids":["CWE-307"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-03-31T23:59:17Z","nvd_published_at":null},"references":[{"type":"WEB","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33580"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd"},{"type":"PACKAGE","url":"https://github.com/openclaw/openclaw"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/releases/tag/v2026.3.28"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication"}],"affected":[{"package":{"name":"openclaw","ecosystem":"npm","purl":"pkg:npm/openclaw"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.3.28"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-9528-x887-j2fp/GHSA-9528-x887-j2fp.json","last_known_affected_version_range":"\u003c= 2026.3.24"}}],"schema_version":"1.9.0"}