CPANSA-HTTP-Parser-XS-2026-116130: HTTP-Parser-XS vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-10-30T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-10-30T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | Severity | ||
| Original language | Language | en | |
| Also referred to | |||
Vulnerability Description
HTTP::Parser::XS versions before 0.18 for Perl truncate PATH_INFO at an encoded NUL byte in parse_http_request.
The XS parser URL-decodes the request path and measures the result with strlen(), so PATH_INFO ends at the first byte decoded from %00. The pure-Perl backend is not affected.
A remote attacker can send a path that a proxy or filter checks in full while the application routes on a shorter one.
Vulnerabilities
CVE-2026-116130
Vulnerability DescriptionHTTP::Parser::XS versions before 0.18 for Perl truncate PATH_INFO at an encoded NUL byte in parse_http_request.
The XS parser URL-decodes the request path and measures the result with strlen(), so PATH_INFO ends at the first byte decoded from %00. The pure-Perl backend is not affected.
A remote attacker can send a path that a proxy or filter checks in full while the application routes on a shorter one.
| Weakness | CWE-626 : Null Byte Interaction Error (Poison Null Byte) |
|---|
Product status
Known affected
| Product | Score | ||||
|---|---|---|---|---|---|
| HTTP-Parser-XS less than 0.18 |
|
Fixed
- HTTP-Parser-XS greater than or equal 0.18
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-HTTP-Parser-XS-2026-116130 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-http-parser-xs-2026-116130.json - https://github.com/kazuho/p5-http-parser-xs/commit/f388b9d7994722b01edd03d57de7d2fb819e1aae.patch external
https://github.com/kazuho/p5-http-parser-xs/commit/f388b9d7994722b01edd03d57de7d2fb819e1aae.patch - https://metacpan.org/release/KAZUHO/HTTP-Parser-XS-0.18/changes external
https://metacpan.org/release/KAZUHO/HTTP-Parser-XS-0.18/changes - http://www.openwall.com/lists/oss-security/2026/10/30/12 external
http://www.openwall.com/lists/oss-security/2026/10/30/12 - CVE-2026-116130 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-116130
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Fri Oct 30 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/