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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-15646 Detail

Description

HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion. Support for the <template> element was added to libgumbo 0.10.0 in 2015, but the walk_tree function in lib/HTML/Gumbo.xs was not updated to support it. The element was treated as a text-node, where strlen() over-reads the heap block that the pointer addresses. Any caller that runs parse() with the default format => 'string', or with format => 'tree', on input containing a <template> element serializes the over-read bytes into the returned result, disclosing bounded heap contents. format => 'callback' reaches a croak on the unhandled node type and is unaffected.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/07/01/7 CVE
https://bugs.debian.org/1104789 CPANSec
https://github.com/bestpractical/HTML-Gumbo/commit/15c0598909d4a64f47ef0a1abc5051f4e113c186.patch CPANSec
https://metacpan.org/release/BPS/HTML-Gumbo-0.19/changes CPANSec

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read CPANSec  
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') CPANSec  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-15646
NVD Published Date:
07/01/2026
NVD Last Modified:
07/01/2026
Source:
CPANSec