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Vulnerability · Published Oct 28, 2026 · Assigned by CPANSec

CVE-2026-116285HTTP::Body versions before 1.23_01 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies

High 7.5

In plain English

A high-severity regular-expression denial of service in HTTP-Body. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 67.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libhttp-body-perlno fix listedDEBIAN-CVE-2026-116285
Debian:13libhttp-body-perlno fix listedDEBIAN-CVE-2026-116285
Debian:14libhttp-body-perl1.24.01-1DEBIAN-CVE-2026-116285
Ubuntu:22.04:LTSlibhttp-body-perlno fix listedUBUNTU-CVE-2026-116285
Ubuntu:24.04:LTSlibhttp-body-perlno fix listedUBUNTU-CVE-2026-116285
Ubuntu:26.04:LTSlibhttp-body-perlno fix listedUBUNTU-CVE-2026-116285
Ubuntu:26.10libhttp-body-perlno fix listedUBUNTU-CVE-2026-116285

Affected products (as reported)

VendorProductVersions
HTTP-Body 0 – before 1.23_01

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References