CVE-2026-116128: high-severity vulnerability in Starlet
Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.
The decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.
A remote attacker can exhaust a worker's memory with a single request.
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-2026-115866HIGHStarlet versions from 0.20 before 0.33 for Perl allow CPU exhaustion via regular expression backtracking when decoding chunked request bodiesEPSS 0.4%CVE-2026-115865HIGHStarlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memoryEPSS 0.4%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 0.3%