TI-2026-82120 Aliases CVE-2026-116285 GHSA-q6fp-395r-83jv

Quadratic regex backtracking in HTTP::Body for Perl enables CPU exhaustion

LOW 39CWE-1333Published 2026-10-28 · Updated 2026-11-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-1333.

Summary

HTTP::Body for Perl, versions before 1.23_01, allows CPU exhaustion through quadratic regex backtracking when parsing chunked request bodies. In chunked mode, used when no content length is given, add() matches each chunk-size line with a regular expression (CWE-1333), and a long line of hex digits without a carriage return before its first line feed makes the match take time quadratic in the line length. A remote attacker can exhaust CPU in applications that pass chunked request bodies to HTTP::Body, and nothing limits how long the line can be.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

HTTP::Body versions before 1.23_01 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. In chunked mode, used when no content length is given, add() matches each chunk-size line with `/^([\da-fA-F]+).*\x0D\x0A/`. On a line of hex digits whose first LF has no CR before it, the digits and `.*` backtrack against each other, so a single add() takes time quadratic in the line's length. Nothing limits how long the line can be. A remote attacker can exhaust CPU in applications that pass chunked request bodies to HTTP::Body.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00385 32nd percentileScored 2026-11-07

Fix Fixed HTTP-Body: 1.23_01

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	HTTP-Body	before 1.23_01	1.23_01	Patch available	CNA

HTTP-Body Vendor— Affected before 1.23_01 Fixed in 1.23_01 Patch available CNA

Remediation

Update HTTP-Body to version 1.23_01 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Fix · CNA HTTP-Body Fixed in 1.23_01

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-28 Threatist record created from CVE-2026-116285
2026-10-28 Alias added: GHSA-q6fp-395r-83jv
2026-10-29 Affected versions changed · Red Hat
2026-10-29 CVSS score added · Red Hat
2026-11-05 CVSS score added · CISA ADP
2026-11-05 CISA SSVC decision points changed

References

Patch 1

https://github.com/libwww-perl/HTTP-Body/commit/954a5343d2a095b59d357f28759c5388d1169574.patch

Other 1

https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences