Vulnerability · Published May 11, 2026 · Assigned by VulnCheck

CVE-2026-44999OpenClaw < 2026.4.20 - Improper Trust Labeling in Isolated Cron Awareness Events

Medium 5.3

In plain English

A medium-severity insufficient verification of data authenticity 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 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 95.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

OpenClaw before 2026.4.20 fails to properly preserve untrusted labels for isolated cron awareness events, allowing webhook-triggered cron agent output to be recorded as trusted system events. Attackers can exploit this trust-labeling issue to strengthen prompt-injection attacks by rendering untrusted events as trusted System events.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	openclaw	2026.4.20	GHSA-57r2-h2wj-g887

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	0 – before 2026.4.20

Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-57r2-h2wj-g887) vendor-advisory
Patch Commit patch
VulnCheck Advisory: OpenClaw < 2026.4.20 - Improper Trust Labeling in Isolated Cron Awareness Events third-party-advisory