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9.8 Critical

CVE-2025-1009 An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash

Description

An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

Affected products and versions

Product Affected versions Fixed in
Firefox 135 earliest → < 135 135
Firefox 128.7 earliest → < 128.7 128.7
Firefox 115.20 earliest → < 115.20 115.20
Firefox ESR 128.7 earliest → < 128.7 128.7
Thunderbird 135 earliest → < 135 135
Thunderbird 128.7 earliest → < 128.7 128.7

References

Timeline

  1. Published
  2. Last modified

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CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118025 Other issue in the SVG component 8.8 High CVE-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High
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