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1 vulnerability found for HTML::Gumbo by BPS

CVE-2025-15646 (GCVE-0-2025-15646)

Vulnerability from cvelistv5 – Published: 2026-07-01 14:38 – Updated: 2026-07-01 18:09
VLAI?
Title
HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion
Summary
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.
CWE
  • CWE-843 - Access of Resource Using Incompatible Type (Type Confusion)
  • CWE-125 - Out-of-bounds Read
Assigner
Impacted products
Vendor Product Version
BPS HTML::Gumbo Affected: 0 , < 0.19 (custom)
Create a notification for this product.
Credits
Vincent Lefevre Niko Tyni
Show details on NVD website

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          "value": "HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion.\n\nSupport for the \u003ctemplate\u003e 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.\n\nAny caller that runs parse() with the default format =\u003e \u0027string\u0027, or with format =\u003e \u0027tree\u0027, on input containing a \u003ctemplate\u003e element serializes the over-read bytes into the returned result, disclosing bounded heap contents. format =\u003e \u0027callback\u0027 reaches a croak on the unhandled node type and is unaffected."
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          "url": "https://github.com/bestpractical/HTML-Gumbo/commit/15c0598909d4a64f47ef0a1abc5051f4e113c186.patch"
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          "tags": [
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          "url": "https://metacpan.org/release/BPS/HTML-Gumbo-0.19/changes"
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          "tags": [
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          "url": "https://bugs.debian.org/1104789"
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      "solutions": [
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          "lang": "en",
          "value": "Upgrade to HTML-Gumbo 0.19 or later, which adds GUMBO_NODE_TEMPLATE to the container node types handled by walk_tree."
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          "time": "2015-04-30T00:00:00.000Z",
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          "time": "2025-05-17T00:00:00.000Z",
          "value": "Fix committed upstream."
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