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Vulnerability · Published Oct 28, 2026 · Assigned by CPANSec

CVE-2026-116133HTTP::Body versions before 1.23_01 for Perl allow CPU exhaustion via quadratic rescanning of a multipart body with a missing or malformed boundary

High 7.5

In plain English

A high-severity security flaw 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 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 58.8% 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 rescanning of a multipart body with a missing or malformed boundary. Before the first part, and between parts, the multipart parser searches the whole buffered body for the next boundary. On a miss it keeps everything and searches again from the start when the next chunk arrives. A body with no boundary, or with a delimiter followed by neither CRLF nor "--", is therefore rescanned on every chunk, taking time quadratic in its size. A remote attacker can exhaust worker CPU with a few such requests.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libhttp-body-perlno fix listedDEBIAN-CVE-2026-116133
Debian:13libhttp-body-perlno fix listedDEBIAN-CVE-2026-116133
Debian:14libhttp-body-perl1.24.01-1DEBIAN-CVE-2026-116133
Ubuntu:22.04:LTSlibhttp-body-perlno fix listedUBUNTU-CVE-2026-116133
Ubuntu:24.04:LTSlibhttp-body-perlno fix listedUBUNTU-CVE-2026-116133
Ubuntu:26.04:LTSlibhttp-body-perlno fix listedUBUNTU-CVE-2026-116133
Ubuntu:26.10libhttp-body-perlno fix listedUBUNTU-CVE-2026-116133

Affected products (as reported)

VendorProductVersions
HTTP-Body 0 – before 1.23_01

Weakness: CWE-407 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References