{"id":"CVE-2026-35646","aliases":["GHSA-mf5g-6r6f-ghhm"],"url":"https://o3.security/vulnerability/CVE-2026-35646","summary":"OpenClaw < 2026.3.25 - Pre-Authentication Rate-Limit Bypass in Webhook Token Validation","details":"## Summary\n\nSynology Chat Webhook Pre-Auth Rate-Limit Bypass Enables Brute-Force Guessing of Weak Webhook Token\n\n## Affected Packages / Versions\n\n- Package: `openclaw`\n- Affected versions: `<= 2026.3.24`\n- First patched version: `2026.3.25`\n- Latest published npm version at verification time: `2026.3.24`\n\n## Details\n\nSynology Chat webhook auth previously rejected invalid tokens without throttling repeated guesses, allowing brute-force attempts against weak webhook secrets. Commit `0b4d07337467f4d40a0cc1ced83d45ceaec0863c` adds repeated-guess throttling before auth failure responses.\n\nVerified vulnerable on tag `v2026.3.24` and fixed on `main` by commit `0b4d07337467f4d40a0cc1ced83d45ceaec0863c`.\n\n## Fix Commit(s)\n\n- `0b4d07337467f4d40a0cc1ced83d45ceaec0863c`","published":"2026-04-09T21:27:11.563Z","modified":"2026-10-28T02:30:58.620719826Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"openclaw","fixedVersion":"2026.3.28"}],"fix":{"url":"https://github.com/openclaw/openclaw/commit/0b4d07337467f4d40a0cc1ced83d45ceaec0863c","label":"openclaw/openclaw@0b4d073"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35646.json"},{"type":"ADVISORY","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-mf5g-6r6f-ghhm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35646"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openclaw-pre-authentication-rate-limit-bypass-in-webhook-token-validation"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/0b4d07337467f4d40a0cc1ced83d45ceaec0863c"},{"type":"PACKAGE","url":"https://github.com/openclaw/openclaw"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:58.620719826Z"}}