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Description

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.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-09 | Updated 2026-04-10 | Assigner VulnCheck




MEDIUM: 6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

MEDIUM: 4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-307 Improper Restriction of Excessive Authentication Attempts

Product status

Default status
unaffected

Any version before 2026.3.25
affected

2026.3.25 (semver)
unaffected

Credits

Peng Zhou (@zpbrent) reporter

References

github.com/...enclaw/security/advisories/GHSA-xq8g-hgh6-87hv (GitHub Security Advisory (GHSA-xq8g-hgh6-87hv)) third-party-advisory

github.com/...ommit/5e08ce36d522a1c96df2bfe88e39303ae2643d92 (Patch Commit) patch

www.vulncheck.com/...-missing-webhook-password-rate-limiting (VulnCheck Advisory: OpenClaw < 2026.3.25 - Brute-Force Attack via Missing Webhook Password Rate Limiting) third-party-advisory

cve.org (CVE-2026-35623)

nvd.nist.gov (CVE-2026-35623)

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