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

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-12 · updated 2026-07-23
Weakness: CWE-290

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 products

OpenClaw: before 2026.5.3 — fixed in 2026.5.3

How to fix

Upgrade to a fixed version: OpenClaw 2026.5.3. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-c29c-2q9c-pc86
https://www.vulncheck.com/advisories/openclaw-privilege-escalation-via-mutable-slack-display-names-in-allowfrom

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