CVE-2026-56406 | BDVDB-2026-341950 Detail

libexpat projectlibexpat

Description#

libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact low. Attack vector: local.

No public exploit known

6.9 Medium

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 6.9.

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Memory Corruption

No specific action is recorded in the source data. Check the references for vendor guidance.

Not available

6.9 Medium

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

Not available

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).