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CVE-2026-56407

Published: 6/21/2026 Last updated: 6/22/2026 Reserved: 6/21/2026

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.

CNA assigner: mitre (8254265b-2729-46b6-b9e3-3dfca2d5bfca) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 6.9 Medium CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Opam packages affected (4)

conf-expat conf-gtk2 conf-gtk3 ocaml-expat

Products affected (2)

Product Vendor Version
libexpat libexpat project < 16.0.5173.1000
libexpat libexpat project n/a

References (2)