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Description

OpenClaw versions prior to 2026.3.2 contain a denial of service vulnerability in webhook handlers for BlueBubbles and Google Chat that parse request bodies before performing authentication and signature validation. Unauthenticated attackers can exploit this by sending slow or oversized request bodies to exhaust parser resources and degrade service availability.

PUBLISHED Reserved 2026-03-10 | Published 2026-03-19 | Updated 2026-03-20 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

Any version before 2026.3.2
affected

2026.3.2 (semver)
unaffected

Credits

Baozongwi'xd (@GCXWLP) reporter

References

github.com/...enclaw/security/advisories/GHSA-x4vp-4235-65hg (GitHub Security Advisory (GHSA-x4vp-4235-65hg)) third-party-advisory

github.com/...ommit/d3e8b17aa6432536806b4853edc7939d891d0f25 (Patch Commit) patch

www.vulncheck.com/...rvice-via-pre-auth-webhook-body-parsing (VulnCheck Advisory: OpenClaw < 2026.3.2 - Slow-Request Denial of Service via Pre-Auth Webhook Body Parsing) third-party-advisory

cve.org (CVE-2026-32011)

nvd.nist.gov (CVE-2026-32011)

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