Buffer Overflow Vulnerability in libexpat Affects Multiple Versions
CVE-2026-25210

6.9MEDIUM

Key Information:

Vendor

Libexpat Project

Status
Libexpat
Vendor
CVE Published:
30 January 2026

What is CVE-2026-25210?

The doContent function in libexpat versions prior to 2.7.4 is vulnerable due to a lack of integer overflow checks during tag buffer reallocation. This oversight can lead to improper buffer size determination, increasing the risk of buffer overflow attacks. Attackers could exploit this vulnerability to execute arbitrary code or disrupt service, making it critical for users to update to a patched version.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

libexpat 0 < 2.7.4

References

https://github.com/libexpat/libexpat/pull/1075
https://github.com/libexpat/libexpat/pull/1075/commits/9c...

CVSS V3.1

Score:
6.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.