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.
Metrics
Affected Vendors & Products
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Solution
Upgrade to Web::Simple 0.035 or later, and in the application configure $Web::Dispatch::ParamParser::MAX_BODY_SIZE.
Workaround
For deployments that cannot upgrade but are running behind a reverse proxy, configure the proxy to reject requests above a maxiumum Content-Length.
Sat, 24 Oct 2026 17:30:00 +0000
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Sat, 24 Oct 2026 14:00:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters | |
| Weaknesses | CWE-789 | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-10-24T16:06:39.380Z
Reserved: 2026-10-21T21:43:01.842Z
Link: CVE-2026-114629
Vulnrichment
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NVD
Status : Received
Published: 2026-10-24T14:16:39.187
Modified: 2026-10-24T17:16:26.297
Link: CVE-2026-114629
Redhat
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OpenCVE Enrichment
Updated: 2026-10-24T15:30:14Z