CVE-2026-53851 | THREATINT

Description

OpenClaw before 2026.5.12 contains a notification bypass vulnerability allowing Slack reaction events to enter the agent pipeline despite disabled reaction notifications. Attackers can trigger unintended agent processing by sending reaction events when the feature is enabled, potentially leading to unauthorized processing of lower-trust input.

PUBLISHED Reserved 2026-06-10 | Published 2026-06-16 | Updated 2026-06-16 | Assigner VulnCheck

MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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

Problem types

Missing Authorization

Product status

Default status

unaffected

Any version before 2026.5.12

affected

2026.5.12 (semver)

unaffected

Credits

Edward-x (@YLChen-007) reporter

References

github.com/...enclaw/security/advisories/GHSA-fcvx-5cxc-v5p8 (GitHub Security Advisory (GHSA-fcvx-5cxc-v5p8)) vendor-advisory

www.vulncheck.com/...lack-reaction-event-notification-bypass (VulnCheck Advisory: OpenClaw < 2026.5.12 - Slack Reaction Event Notification Bypass) third-party-advisory

cve.org (CVE-2026-53851)

nvd.nist.gov (CVE-2026-53851)

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