# CVE-2026-116131: HTTP::Body request body denial of service via field count exhaustion

Source: https://junglewise.ai/threats/cve-2026-116131-http-body-versions-before-1-23-01-for-perl-allow-memory-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-28. Updated: 2026-10-28  
License: CC BY 4.0 with a link back

CVE-2026-116131 · Severity: info · Published 2026-10-28

HTTP::Body is a Perl library for parsing HTTP request bodies, commonly used by web application frameworks to handle form submissions and file uploads. Before version 1.23_01, it did not limit the number of form fields or multipart parts, allowing an attacker to exhaust worker process memory or fill the server with temporary files by sending a request with thousands of fields or parts. This can cause denial of service by making the application unresponsive or crashing worker processes.

Technologies: [Libwww-Perl HTTP::Body](https://junglewise.ai/threats/technologies/libwww-perl-http-body). Vendors: [Libwww-Perl](https://junglewise.ai/threats/vendors/libwww-perl).

## Quick answers

**Is CVE-2026-116131 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116131 being exploited in the wild.

**How severe is CVE-2026-116131?** Informational severity, published 28 October 2026.

**Which products and versions are affected?** Libwww-Perl HTTP::Body before 1.23_01.

**Is there a fix for CVE-2026-116131?** Yes: fixed in HTTP::Body 1.23_01. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116131 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116131?** Check whether you run Libwww-Perl HTTP::Body at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in HTTP::Body 1.23_01

## Technical details

The vulnerability exists in two HTTP body parsers: the urlencoded parser splits the entire request body on separators before processing, consuming ~90 bytes of memory per separator byte, and the multipart parser creates a temporary file for each part with a filename attribute. Neither parser enforces limits on the number of fields (urlencoded) or parts (multipart) in a request body. An unauthenticated remote attacker can send a crafted HTTP request with many separators or multipart boundaries to exhaust worker memory or disk space. The fix adds configurable limits ($max_params and $max_parts, defaulting to 1000 each) and raises an exception when exceeded.

## Affected products

- libwww-perl HTTP::Body before 1.23_01

## Timeline

- 2026-10-28: disclosed

## References

- [https://cpan.org/modules](https://cpan.org/modules)
- [https://github.com/libwww-perl/HTTP-Body/commit/47beca524a3062eacfd646664576f005fb4be19b.patch](https://github.com/libwww-perl/HTTP-Body/commit/47beca524a3062eacfd646664576f005fb4be19b.patch)

## Related threats

- [HTTP::Body chunked request body parsing hang](https://junglewise.ai/threats/cve-2026-116531-http-body-versions-before-1-23-01-for-perl-lose-track-of-chunk)
- [HTTP::Body percent-escape decoding bypass in urlencoded forms](https://junglewise.ai/threats/cve-2026-116135-http-body-versions-before-1-23-01-for-perl-drop-mixed-case)
- [HTTP::Body Perl multipart parser CPU exhaustion via quadratic rescanning](https://junglewise.ai/threats/cve-2026-116133-http-body-versions-before-1-23-01-for-perl-allow-cpu-exhaustion)
- [HTTP::Body temporary file disclosure in incomplete multipart uploads](https://junglewise.ai/threats/cve-2026-116132-http-body-versions-before-1-23-01-for-perl-leave-the-temporary)