CVE-2026-56132
CVSS Score
6.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-821 |
| Vendor | libexpat project |
| Product | libexpat |
| Published | Jun 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low
Affected Versions
libexpat project / libexpat
0 < 2.8.2