CVE-2026-115866 Affecting starlet package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-STARLET-22085228
- published31 Oct 2026
- disclosed30 Oct 2026
Introduced: 30 Oct 2026
NewCVE-2026-115866 (opens in a new tab)How to fix?
There is no fixed version for Debian:14 starlet.
NVD Description
Note: Versions mentioned in the description apply only to the upstream starlet package and not the starlet package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
Starlet versions from 0.20 before 0.33 for Perl allow CPU exhaustion via regular expression backtracking when decoding chunked request bodies.
A chunk-size line is matched as a run of hex digits, then .* and a CRLF. A run followed by a bare LF and then a CRLF can never match, and the engine retries the match once for each digit, so the time taken grows with the square of the run length. Nothing limits the length of the run, which can span several reads.
A remote attacker can occupy a worker for about a minute of CPU time with one 128 KiB request, before the application is called.