CPANSA-Web-Simple-2026-114629: Web-Simple vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-10-24T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-10-24T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | Severity | ||
| Original language | Language | en | |
| Also referred to | |||
Vulnerability 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.
Vulnerabilities
CVE-2026-114629
Vulnerability DescriptionWeb::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 : Memory Allocation with Excessive Size Value |
|---|
Product status
Known affected
| Product | Score | ||||
|---|---|---|---|---|---|
| Web-Simple less than 0.035 |
|
Fixed
- Web-Simple greater than or equal 0.035
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-Web-Simple-2026-114629 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-web-simple-2026-114629.json - https://github.com/p5sagit/Web-Simple/commit/7e02c4f6204a2898938d357e6efe6dc2679af695.patch external
https://github.com/p5sagit/Web-Simple/commit/7e02c4f6204a2898938d357e6efe6dc2679af695.patch - https://metacpan.org/release/ETHER/Web-Simple-0.035/changes external
https://metacpan.org/release/ETHER/Web-Simple-0.035/changes - http://www.openwall.com/lists/oss-security/2026/10/24/4 external
http://www.openwall.com/lists/oss-security/2026/10/24/4 - CVE-2026-114629 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-114629
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Sat Oct 24 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/