HTTP::Body versions before 1.23_01 for Perl allow memory exhaustion via an unbounded multipart part header block

published 2026-10-28 12 d ago modified 2026-11-05 3 d ago also EUVD-2026-112272

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

HTTP::Body versions before 1.23_01 for Perl allow memory exhaustion via an unbounded multipart part header block.

The multipart parser takes everything up to the first blank line after a boundary as the part's header block, with no limit on its size or number of lines. Every line is stored in the part's header hash, so a block of short lines costs about 60 bytes of memory per input byte.

A remote attacker can exhaust worker memory with a single request.

Patch / fix

distros 2 links 1

debian opensuse

libhttp-body-perl Debian 14 1.24.01-1

debian advisories DEBIAN-CVE-2026-116134

perl-HTTP-Body openSUSE Tumbleweed 1.240.0-1.1

opensuse advisories openSUSE-SU-2026:12346-1

github.com/libwww-perl/HTTP-Body@c5d1391 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-116134 updated 2026-11-03 cvss 7.5

perl-http-body: perl-http-body: Denial of Service via unbounded multipart header block

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 3 d ago (2026-11-05)

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness

CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

CVE List CVE-2026-116134
NVD CVE-2026-116134

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary