Vulnerability · Published Jun 12, 2026 · Assigned by VulnCheck

CVE-2026-53823OpenClaw < 2026.5.3 - Privilege Escalation via Mutable Slack Display Names in allowFrom

High 8.1

In plain English

A high-severity authentication bypass by spoofing in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.2%top 88.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	openclaw	2026.5.3	GHSA-c29c-2q9c-pc86

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	0 – before 2026.5.3

Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-c29c-2q9c-pc86) vendor-advisory
VulnCheck Advisory: OpenClaw < 2026.5.3 - Privilege Escalation via Mutable Slack Display Names in allowFrom third-party-advisory