CVE-2026-56406CWE-190

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

Medium · published June 21, 2026

CVSS v3.1
6.9
EPSS
0%
Percentile
6.5
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.9 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00174 · 6.5th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-06-21T15:48Z
EPSS history
Timeline
  • 21 JUN 15:48Z
    libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse
    cvelistv5