CVE-2026-115865

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CVE-2026-115865

Summary: Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory

Details: Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory. The request body is read in a loop that asks sysread for all of the remaining declared length at once. Perl grows the read buffer to that size before any data arrives, so a length larger than available memory makes the worker exit with an uncatchable out of memory error before the application is called. A remote attacker can force a worker restart with each request of a few bytes.

References: https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115865.json, https://metacpan.org/release/KAZUHO/Starlet-0.33/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-115865, https://github.com/kazuho/Starlet/commit/598947ac620fd31b390335c683d79fa244770782.patch, https://github.com/kazuho/Starlet