Vulnerability in Roocodeinc Roo-Code
CVE-2026-63108
Roo Code through 3.54.0 contains a command injection vulnerability in the auto-approve execute feature that allows attackers to bypass allowlist/denylist enforcement by nesting command substitutions inside parameter expansion defaults. The command parser in parse-command.ts replaces parameter expansions with opaque placeholders before extracting command substitutions, causing the containsDangerousSubstitution guard to miss nested payloads, which are then auto-approved based on the outer allowlisted command prefix and executed by the shell via execa, enabling arbitrary command execution.
EPSS: 0.018 (76.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Roocodeinc Roo-code — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description, exploit)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-63108?
- CVE-2026-63108 is a high-severity vulnerability in Roocodeinc Roo-Code, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.8/10. Published 2026-07-20.
- How severe is CVE-2026-63108?
- High severity. CVSS v3 base score is 8.8 out of 10.