CVE-2026-56132 | THREATINT

Description

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

PUBLISHED Reserved 2026-06-19 | Published 2026-06-19 | Updated 2026-06-19 | Assigner mitre

MEDIUM: 6.9CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Problem types

CWE-821 Incorrect Synchronization

Product status

Default status

unaffected

Any version before 2.8.2

affected

References

github.com/libexpat/libexpat/pull/1272

cve.org (CVE-2026-56132)

nvd.nist.gov (CVE-2026-56132)

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