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.

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Fixes

Solution

Upgrade to Starlet 0.33 or later.


Workaround

No workaround given by the vendor.

History

Fri, 30 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Kazuho
Kazuho starlet
Vendors & Products Kazuho
Kazuho starlet

Fri, 30 Oct 2026 13:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies
Weaknesses CWE-770
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-10-30T12:46:30.844Z

Reserved: 2026-10-25T10:18:33.774Z

Link: CVE-2026-116128

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-30T13:18:31.293

Modified: 2026-10-30T13:18:31.293

Link: CVE-2026-116128

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-30T15:00:15Z

Weaknesses