CVE-2026-35626 | THREATINT

Description

OpenClaw before 2026.3.22 contains an unauthenticated resource exhaustion vulnerability in voice call webhook handling that buffers request bodies before provider signature checks. Attackers can send large or malicious webhook requests to exhaust server resources without authentication by bypassing signature validation.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-09 | Updated 2026-04-14 | Assigner VulnCheck

MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-405 Asymmetric Resource Consumption (Amplification)

Product status

Default status

unaffected

Any version before 2026.3.22

affected

2026.3.22 (semver)

unaffected

Credits

Seokjun Ryu (@SEORY0) reporter

References

github.com/...enclaw/security/advisories/GHSA-rm59-992w-x2mv (GitHub Security Advisory (GHSA-rm59-992w-x2mv)) third-party-advisory

github.com/...ommit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch Commit #1) patch

github.com/...ommit/651dc7450b68a5396a009db78ef9382633707ead (Patch Commit #2) patch

www.vulncheck.com/...ource-exhaustion-via-voice-call-webhook (VulnCheck Advisory: OpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call Webhook) third-party-advisory

cve.org (CVE-2026-35626)

nvd.nist.gov (CVE-2026-35626)

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