CVE-2026-116127 Affecting starlet package, versions <0.33-1
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-DEBIANUNSTABLE-STARLET-22085237
- published31 Oct 2026
- disclosed30 Oct 2026
Introduced: 30 Oct 2026
NewCVE-2026-116127 (opens in a new tab)How to fix?
Upgrade Debian:unstable starlet to version 0.33-1 or higher.
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:unstable relevant fixed versions and status.
Starlet versions before 0.33 for Perl send a body in responses to HEAD requests, corrupting the next response on a persistent or pipelined connection.
The request method is not passed to the response writer, so whatever body the application returns for a HEAD request is sent. With Plack::Middleware::Head the body is empty, but an HTTP/1.1 response without a Content-Length header still gets the chunked encoding terminator. Responses with status 204 or 304 are also sent with their body.
Pipelined GET and HEAD requests keep the connection open even when keep-alive is disabled, which is the default. A client or proxy reading the connection takes the extra bytes as the start of the next response, which may desynchronize a proxy that shares the connection across clients.