Vulnerability in Openclaw
CVE-2026-44995
OpenClaw before 2026.4.20 contains an improper environment variable validation vulnerability in MCP stdio server configuration that allows attackers to execute arbitrary code. Malicious workspace configurations can pass dangerous startup variables like NODE_OPTIONS, LD_PRELOAD, or BASH_ENV to spawned MCP server processes, enabling code injection when operators start sessions using those servers.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Openclaw — versions 0, 2026.4.20
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-mj59-h3q9-ghfh (vendor-advisory, Third Party Advisory)
- github.com/openclaw/openclaw/commit/62fa5071896e95edc7f67d1cebc70a2859e283af (Patch, patch)
- github.com/openclaw/openclaw/commit/85d86ebc4bf3d2226d39d132a484f4f7a299fa1b (patch, Broken Link)
- www.vulncheck.com/advisories/openclaw-arbitrary-code-execution-via-mcp-stdio-en… (Patch, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-44995?
- CVE-2026-44995 is a high-severity vulnerability in Openclaw, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 7.3/10. Published 2026-05-11.
- How severe is CVE-2026-44995?
- High severity. CVSS v3 base score is 7.3 out of 10.