Home/CVE/OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers
CVE

CVE-2026-35623

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers to brute-force weak webhook passwords without throttling. Remote attackers can repeatedly submit incorrect password guesses to the webhook endpoint to compromise authentication and gain unauthorized access.

MEDIUM · CVSS 4.8 EPSS 0.00108
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-307Improper Restriction of Excessive Authentication Attempts
▤

Affected Products & Versions

1
openclaw< 2026.3.25
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm openclaw MODERATE
▣

Scoring & Timeline

4.8
MEDIUM · CVSS v3.1 · disclosure@vulncheck.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Apr 2026 · 10:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/openclaw/openclaw/commit/5e08ce36d522a1c96df2bfe88e39303ae2643d92Patch
https://github.com/openclaw/openclaw/security/advisories/GHSA-xq8g-hgh6-87hvVendor Advisory
https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-webhook-password-rate-limitingThird Party Advisory
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