# CVE-2026-114629: libweb-simple-perl: Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body p...

CVE-2026-114629 is fixed in libweb-simple-perl on 1 platform by DEBIAN-CVE-2026-114629 (version 0.035-1), released October 27, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-114629
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0050
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 24, 2026

## Description

Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters.  Web::Dispatch::ParamParser::get_unpacked_body_from reads an application/x-www-form-urlencoded body using a single read call, with no cap and the return value ignored. Perl's read grows the buffer to the requested length before reading, so the declared Content-Length determines the allocation.  An attacker can trigger this through any route whose dispatch specification has a % body-parameter match, such as sub (POST + %name=), sending a Content-Length far larger than the body actually sent. No authentication is involved.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libweb-simple-perl Debian 14 | 0.035-1 | [DEBIAN-CVE-2026-114629](https://patchblox.com/security/data/fix/linux/debian-cve-2026-114629.md) | Oct 27, 2026 |

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Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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