# CVE-2026-116134: HTTP::Body memory exhaustion in multipart header parsing

Source: https://junglewise.ai/threats/cve-2026-116134-http-body-versions-before-1-23-01-for-perl-allow-memory  
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-2026-116134 · Severity: info · Published 2026-10-28

HTTP::Body is a Perl library that parses HTTP request bodies, including multipart form data commonly used for file uploads. A vulnerability allows attackers to exhaust server memory by sending a request with an extremely large or many-lined multipart header block, causing denial of service. This affects any web application using HTTP::Body to process file uploads or form submissions.

Vendors: [CPAN](https://junglewise.ai/threats/vendors/cpan).

## Quick answers

**Is CVE-2026-116134 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116134 being exploited in the wild.

**How severe is CVE-2026-116134?** Informational severity, published 28 October 2026.

**Which products and versions are affected?** CPAN HTTP::Body before 1.23_01.

**Is there a fix for CVE-2026-116134?** Yes: fixed in HTTP::Body 1.23_01. Until then: Set $HTTP::Body::MultiPart::max_header_size and $HTTP::Body::MultiPart::max_header_lines to appropriate limits in your application (defaults are 32 KiB and 100 lines respectively); or disable multipart parsing if not required. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116134 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-116134?** Check whether you run CPAN 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

Set $HTTP::Body::MultiPart::max_header_size and $HTTP::Body::MultiPart::max_header_lines to appropriate limits in your application (defaults are 32 KiB and 100 lines respectively); or disable multipart parsing if not required.

## Technical details

The multipart parser in HTTP::Body does not limit the size or line count of a part's header block (the headers preceding the first blank line after a boundary marker). Each line is stored in a header hash, resulting in approximately 60 bytes of memory overhead per input byte. An unauthenticated remote attacker can trigger memory exhaustion with a single malicious request, causing worker process crashes or system resource depletion.

## Affected products

- CPAN HTTP::Body before 1.23_01

## Timeline

- 2026-10-28: disclosed
- 2026-10-25: patched: Fix committed to repository

## References

- [https://cpan.org/modules](https://cpan.org/modules)
- [https://github.com/libwww-perl/HTTP-Body/commit/c5d13911aabfad4a7ae4b6ee98ac2315400e5ed5.patch](https://github.com/libwww-perl/HTTP-Body/commit/c5d13911aabfad4a7ae4b6ee98ac2315400e5ed5.patch)

## Related threats

- [HTTP::Body regex denial of service in chunked request parsing](https://junglewise.ai/threats/cve-2026-116285-http-body-versions-before-1-23-01-for-perl-allow-cpu-exhaustion)