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Description

OpenClaw before 2026.3.31 contains an allowlist bypass vulnerability in Matrix thread root and reply context handling that fails to properly validate message senders. Attackers can fetch thread-root and reply context messages that should be filtered by sender allowlists, bypassing access controls.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-28 | Updated 2026-04-29 | Assigner VulnCheck




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

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Problem types

CWE-346: Origin Validation Error

Product status

Default status
unaffected

Any version before 2026.3.31
affected

2026.3.31 (semver)
unaffected

Credits

AntAISecurityLab reporter

References

github.com/...enclaw/security/advisories/GHSA-rg8m-3943-vm6q (GitHub Security Advisory (GHSA-rg8m-3943-vm6q)) vendor-advisory

github.com/...ommit/8a563d603b70ef6338915f0527bee87282c3bad5 (Patch Commit) patch

www.vulncheck.com/...-allowlist-bypass-via-sender-validation (VulnCheck Advisory: OpenClaw < 2026.3.31 - Matrix Thread Context Allowlist Bypass via Sender Validation) third-party-advisory

cve.org (CVE-2026-41376)

nvd.nist.gov (CVE-2026-41376)

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