CVE-2026-56408

🔶 medium

🔍 Scan for this CVE

libexpat before 2.8.2 has an integer overflow in copyString.

CVSS Score

6.9

Medium

EPSS Score

0.1

Exploit Probability

Published Date

2026-06-21

First Seen: 2026-06-25

This CVE is Moderate Risk - more severe than 51.0% of all 329,456 vulnerabilities in our database.

#161,290

Above average severity

Severity Percentile

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-06-23

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-190

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
libexpat_project	libexpat	Affected	< 2.8.2

Patch

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-56403	🔶 medium	6.9	0.1	libexpat before 2.8.2 has an integer overflow in storeAtts.	2026-06-21
CVE-2026-56404	🔶 medium	6.9	0.1	libexpat before 2.8.2 has an integer overflow in addBinding.	2026-06-21
CVE-2026-56405	🔶 medium	6.9	0.1	libexpat before 2.8.2 has an integer overflow in getAttributeId.	2026-06-21
CVE-2026-56406	🔶 medium	6.9	0.1	libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse...	2026-06-21
CVE-2026-56407	🔶 medium	6.9	0.1	libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.	2026-06-21
CVE-2026-56409	🔶 medium	6.5	0.1	xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.	2026-06-21

These CVEs affect the same products