CVE-2026-115865: high-severity vulnerability in Starlet
Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.2%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
StarletRelated CVEs — Starlet
In the same product, most dangerous first.
CVE-2026-116128HIGHStarlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodiesEPSS 0.2%CVE-2026-115866HIGHStarlet versions from 0.20 before 0.33 for Perl allow CPU exhaustion via regular expression backtracking when decoding chunked request bodiesEPSS 0.2%CVE-2026-116127CRITICALStarlet versions before 0.33 for Perl send a body in responses to HEAD requests, corrupting the next response on a persistent or pipelined connectionEPSS 0.2%