Auth bypass in Openclaw
CVE-2026-53855
OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- Openclaw — versions 0, 2026.4.2
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-5cj2-3jr2-5h77 (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/openclaw-shell-positional-parameters-bypass-in-inl… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-53855?
- CVE-2026-53855 is a high-severity vulnerability in Openclaw, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.1/10. Published 2026-06-16.
- How severe is CVE-2026-53855?
- High severity. CVSS v3 base score is 8.1 out of 10.