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ALPINE-CVE-2026-76641

ALPINE-CVE-2026-76641

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.

CVSS 8.7 · High · Fix available

Published
Updated

Stack: system

Affected products and versions

  • expat Alpine:v3.21

    Affected ranges
    • ECOSYSTEM: < 2.8.4-r0

    Update to 2.8.4-r0

  • expat Alpine:v3.22

    Affected ranges
    • ECOSYSTEM: < 2.8.4-r0

    Update to 2.8.4-r0

  • expat Alpine:v3.23

    Affected ranges
    • ECOSYSTEM: < 2.8.4-r0

    Update to 2.8.4-r0

  • expat Alpine:v3.24

    Affected ranges
    • ECOSYSTEM: < 2.8.4-r0

    Update to 2.8.4-r0

Original sources

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