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Vulnerability IntelligenceCVE-2026-56403

CVE-2026-56403

MEDIUM6.9

libexpat before 2

Published Jun 21, 2026

Modified 2 days ago

Details

libexpat before 2.8.2 has an integer overflow in storeAtts.

References

https://github.com/libexpat/libexpat/pull/1232

https://www.cve.org/CVERecord?id=CVE-2026-56403

CVSS Analysis

CVSS v3.1

6.9

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

HighAC:H

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

LowA:L

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

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedJun 21, 2026

ModifiedJun 22, 2026

CVE-2026-56403 | Mondoo Vulnerability Intelligence