CVE-2026-114629 Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters.
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114629?
CVE-2026-114629 is a vulnerability, published on 24 Oct 2026.
Official 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.
Weakness: CWE-789
Which versions are affected by CVE-2026-114629?
How do I fix CVE-2026-114629?
Upgrade to a fixed version.
Is CVE-2026-114629 being exploited?
There is no known exploitation of CVE-2026-114629 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-114629, GHSA-38cx-9rf2-hq5v.