CVE-2026-115822
Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when…
- Risk score
- 54/100
- CVSS
- 7.5 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 25 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 th…
- Affected
- See advisory
- Fix
- Upgrade the product to 0.4019 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.5 high
- Remotely exploitable without logging in
References
Original 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.
Last activity 25 Oct 2026. Patch Forecast updates every hour.