======================================================================== CVE-2026-114629                                      CPAN Security Group ========================================================================

CVE ID:  CVE-2026-114629

Distribution:  Web-Simple       Versions:  before 0.035       MetaCPAN:  https://metacpan.org/dist/Web-Simple       VCS Repo:  https://github.com/p5sagit/Web-Simple

Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters

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::getunpackedbodyfrom 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.

Problem types ------------- - CWE-789 Memory Allocation with Excessive Size Value

Workarounds ----------- For deployments that cannot upgrade but are running behind a reverse proxy, configure the proxy to reject requests above a maxiumum Content-Length.

Solutions --------- Upgrade to Web::Simple 0.035 or later, and in the application configure $Web::Dispatch::ParamParser::MAXBODYSIZE.

References ---------- https://github.com/p5sagit/Web-Simple/commit/7e02c4f6204a2898938d357e6efe6dc2679af695.patch https://metacpan.org/release/ETHER/Web-Simple-0.035/changes