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Description

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-27 | Updated 2026-04-28 | Assigner VulnCheck




LOW: 2.3CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-668: Exposure of Resource to Wrong Sphere

Product status

Default status
unaffected

2026.2.19 (semver) before 2026.3.31
affected

2026.3.31 (semver)
unaffected

Credits

Nathan (@nexrin) reporter

KeenSecurityLab finder

qclawer finder

References

github.com/...enclaw/security/advisories/GHSA-fqrj-m88p-qf3v (GitHub Security Advisory (GHSA-fqrj-m88p-qf3v)) vendor-advisory

github.com/...ommit/4d038bb242c11f39e45f6a4bde400e5fd42e4ebf (Patch Commit) patch

github.com/...ommit/7cea7c29705b188b464cc9cdc107c275b94b2a72 (Patch Commit) patch

www.vulncheck.com/...t-suppression-via-shared-authentication (VulnCheck Advisory: OpenClaw 2026.2.19 < 2026.3.31 - Webhook Replay Dedupe Cache Event Suppression via Shared Authentication) third-party-advisory

cve.org (CVE-2026-41362)

nvd.nist.gov (CVE-2026-41362)

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