PatchSiren cyber security CVE debrief
CVE-2026-53855 OpenClaw CVE debrief
CVE-2026-53855 is a HIGH-severity vulnerability in OpenClaw, a software that enables users to manage and automate various tasks. The vulnerability, which has a CVSS score of 7.6, allows authenticated operators to bypass strict allowlist checks via shell positional parameters, potentially enabling the execution of unapproved shell-provided content.
- Vendor
- OpenClaw
- Product
- Unknown
- CVSS
- HIGH 7.6
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-16
- Original CVE updated
- 2026-06-18
- Advisory published
- 2026-06-16
- Advisory updated
- 2026-06-18
Who should care
Users of OpenClaw before version 2026.4.2 should be aware of this vulnerability and take steps to mitigate it.
Technical summary
The vulnerability exists in OpenClaw before 2026.4.2 and allows authenticated operators to weaken strict allowlist checks via shell positional parameters. This can be exploited by combining allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules.
Defensive priority
HIGH
Recommended defensive actions
- Update OpenClaw to version 2026.4.2 or later.
- Restrict access to authenticated operators.
- Monitor for suspicious activity.
Evidence notes
The CVE-2026-53855 vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt]. The vulnerability has been reported by Vulncheck and can be found in the NVD database.
Official resources
CVE-2026-53855 was published on 2026-06-16T19:17:02.910Z and modified on 2026-06-16T20:42:46.200Z.