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Description

OpenClaw before 2026.4.2 fails to filter Slack thread context by sender allowlist, allowing non-allowlisted messages to enter agent context. Attackers can inject unauthorized thread messages through allowlisted user replies to bypass sender access controls and manipulate model context.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-23 | Updated 2026-04-24 | 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 2026.4.2
affected

2026.4.2 (semver)
unaffected

Credits

AntAISecurityLab reporter

References

github.com/...enclaw/security/advisories/GHSA-qm77-8qjp-4vcm (GitHub Security Advisory (GHSA-qm77-8qjp-4vcm)) vendor-advisory

github.com/...ommit/ac5bc4fb37becc64a2ec314864cca1565e921f2d (Patch Commit) patch

www.vulncheck.com/...lowlist-bypass-via-slack-thread-context (VulnCheck Advisory: OpenClaw < 2026.4.2 - Sender Allowlist Bypass via Slack Thread Context) third-party-advisory

cve.org (CVE-2026-41358)

nvd.nist.gov (CVE-2026-41358)

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