OpenClaw before 2026.3.31 contains a sender allowlist bypass vulnerability in MS Teams thread history fetched via Graph API. Attackers can retrieve thread messages that should be filtered by sender allowlists, bypassing message filtering restrictions.
https://www.vulncheck.com/advisories/openclaw-sender-allowlist-bypass-via-graph-api-thread-history
https://github.com/openclaw/openclaw/security/advisories/GHSA-chfm-xgc4-47rj
https://github.com/openclaw/openclaw/commit/5cca38084074fb5095aa11b6a59820d63e4937c9
Published: 2026-04-28
Updated: 2026-04-28
Base Score: 5.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N
Severity: Medium
Base Score: 5.4
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Severity: Medium
Base Score: 5.3
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Severity: Medium