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Description

OpenClaw before 2026.5.3 contains a privilege escalation vulnerability in the allowFrom feature that binds to mutable Slack display names. Attackers with Slack account access can change display name metadata to match policy entries, potentially gaining unauthorized agent access intended for other identities.

PUBLISHED Reserved 2026-06-10 | Published 2026-06-12 | Updated 2026-06-15 | Assigner VulnCheck




HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

HIGH: 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem types

Authentication Bypass by Spoofing

Product status

Default status
unaffected

Any version before 2026.5.3
affected

2026.5.3 (semver)
unaffected

Credits

Philip (@PhilipPhil) reporter

References

github.com/...enclaw/security/advisories/GHSA-c29c-2q9c-pc86 (GitHub Security Advisory (GHSA-c29c-2q9c-pc86)) vendor-advisory

www.vulncheck.com/...utable-slack-display-names-in-allowfrom (VulnCheck Advisory: OpenClaw < 2026.5.3 - Privilege Escalation via Mutable Slack Display Names in allowFrom) third-party-advisory

cve.org (CVE-2026-53823)

nvd.nist.gov (CVE-2026-53823)

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