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.
CVSS
No CVSS.
References
Configurations
No configuration.
History
24 Oct 2026, 17:16
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24 Oct 2026, 14:16
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Information
Published : 2026-10-24 14:16
Updated : 2026-10-26 18:39
NVD link : CVE-2026-114629
Mitre link : CVE-2026-114629
CVE.ORG link : CVE-2026-114629
JSON object : View
Products Affected
No product.
CWE
CWE-789
Memory Allocation with Excessive Size Value
