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CVSS 9.1 · CRITICAL

CVE-2026-43534

OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.

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Analysis

OpenClaw is a niche tool with low adoption in the standard web and mobile development stack. While the vulnerability is critical and allows for privilege escalation to a higher-trust context via malicious hook metadata, its limited deployment does not warrant surfacing this to the broader developer community.

Severity

Score: 9.1(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: NONE
Weakness (CWE): CWE-345

EPSS

Probability of exploitation (next 30 days): 0.0001 (0.0%)
Percentile: 2.9%
EPSS: 2026-05-06

Affects

openclaw:openclaw

Technical description

OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.

Published: 5/5/2026, 12:16:19 PM
Last modified: 5/7/2026, 1:53:35 AM

References

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