Description
HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time.

Everything after the last chunk in the same call to add() is parsed with HTTP::Headers, which takes time quadratic in the number of fields of one name. For example, it takes several seconds to parse 16 KiB of "a:" lines.

A remote attackercan exhause the CPU with a single request.

HTTP::Body version 1.25 limits the size and number of lines in the trailer.
Published: 2026-11-06
Score: n/a
EPSS: < 1% Very Low
KEV: No
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Remediation

Vendor Solution

Upgrade to HTTP::Body version 1.24_02 or later.

Tracking

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Advisories

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History

Fri, 06 Nov 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Libwww-perl
Libwww-perl http-body
Vendors & Products Libwww-perl
Libwww-perl http-body

Fri, 06 Nov 2026 08:00:00 +0000

Type Values Removed Values Added
Description HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time. Everything after the last chunk in the same call to add() is parsed with HTTP::Headers, which takes time quadratic in the number of fields of one name. For example, it takes several seconds to parse 16 KiB of "a:" lines. A remote attackercan exhause the CPU with a single request. HTTP::Body version 1.25 limits the size and number of lines in the trailer.
Title HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time
Weaknesses CWE-770
References

Subscriptions

Libwww-perl Http-body
cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-11-06T07:47:23.570Z

Reserved: 2026-11-03T07:58:36.822Z

Link: CVE-2026-121006

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-06T08:17:19.827

Modified: 2026-11-06T08:17:19.827

Link: CVE-2026-121006

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-06T11:00:15Z

Weaknesses