Vulnerability Description
Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. Starman decodes chunked request bodies before calling the application, matching each chunk-size line with `s/^(([0-9a-fA-F]+).*\015\012)//`. A line of hex digits followed by a bare LF and then CRLF never matches, because `.` does not match LF, and each failed attempt backtracks in time quadratic in the length of the hex run. Nothing limits the length of the line. A remote attacker can exhaust worker CPU by sending such requests to any route.
Related Weaknesses (CWE)
References
- https://github.com/miyagawa/Starman/commit/0f33f9b132b5e410d6cce722ff71988e22476
- https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes
FAQ
What is CVE-2026-115822?
CVE-2026-115822 is a documented vulnerability. Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. Starman decodes chunked request bodies before calling the applicatio...
How severe is CVE-2026-115822?
CVSS scoring is not yet available for CVE-2026-115822. Check NVD for updates.
Is there a patch for CVE-2026-115822?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.