CVE-2026-56132

CVSS 6.9 MEDIUMEPSS 0.1%CWE-821

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.

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

Affected products

libexpat project · libexpat

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References

https://github.com/libexpat/libexpat/pull/1272