GitHub Advisoryadvisory · npm
GHSA-mf5g-6r6f-ghhm OpenClaw: Synology Chat Webhook Pre-Auth Rate-Limit Bypass Enables Brute-Force Guessing of Webhook Token
MEDIUM
Official page ↗
- Aliases
- CVE-2026-35646
- Ecosystem
- npm
- Packages
- openclaw
- Severity
- Moderate
- CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-307, CWE-521
- Reviewed
- 2026-03-29
Affected packages
• npm openclaw: < 2026.3.28 → fixed in 2026.3.28
Description
Summary
Synology Chat Webhook Pre-Auth Rate-Limit Bypass Enables Brute-Force Guessing of Weak Webhook Token
Affected Packages / Versions
• Package: `openclaw`
• Affected versions: `<= 2026.3.24`
• First patched version: `2026.3.25`
• Latest published npm version at verification time: `2026.3.24`
Details
Synology 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.
Verified vulnerable on tag `v2026.3.24` and fixed on `main` by commit `0b4d07337467f4d40a0cc1ced83d45ceaec0863c`.
Fix Commit(s)
• `0b4d07337467f4d40a0cc1ced83d45ceaec0863c`
Related
Alias · CVE (1)
- CVE-2026-35646 OpenClaw before 2026.3.25 contains a pre-authentication rate-limit bypass vulnerability in webhook token validation that allows attackers… vulnerability
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-mf5g-6r6f-ghhm web
- https://nvd.nist.gov/vuln/detail/CVE-2026-35646 advisory
- https://github.com/openclaw/openclaw/commit/0b4d07337467f4d40a0cc1ced83d45ceaec0863c web
- https://github.com/openclaw/openclaw package
- https://www.vulncheck.com/advisories/openclaw-pre-authentication-rate-limit-bypass-in-webhook-token-validation web