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Description

OpenClaw versions prior to 2026.2.13 use non-constant-time string comparison for hook token validation, allowing attackers to infer tokens through timing measurements. Remote attackers with network access to the hooks endpoint can exploit timing side-channels across multiple requests to gradually recover the authentication token.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-05 | Updated 2026-03-05 | 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

Observable Timing Discrepancy

Product status

Default status
unaffected

Any version before 2026.2.13
affected

Credits

Francois Paul Lambert (@Abeyron) reporter

References

github.com/...enclaw/security/advisories/GHSA-47q7-97xp-m272 (GitHub Security Advisory (GHSA-47q7-97xp-m272)) vendor-advisory

github.com/...ommit/113ebfd6a23c4beb8a575d48f7482593254506ec (Patch Commit) patch

www.vulncheck.com/...timing-attack-via-hook-token-comparison (VulnCheck Advisory: OpenClaw < 2026.2.13 - Timing Attack via Hook Token Comparison) third-party-advisory

cve.org (CVE-2026-28475)

nvd.nist.gov (CVE-2026-28475)

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