What is CVE-2026-74860?

CVE-2026-74860 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Release of Invalid Pointer or Reference. CVSS score: 8.5/10. Published 2026-09-08.

How severe is CVE-2026-74860?

High severity. CVSS v3 base score is 8.5 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-74860

A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-763 — Release of Invalid Pointer or Reference

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-74860?: CVE-2026-74860 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Release of Invalid Pointer or Reference. CVSS score: 8.5/10. Published 2026-09-08.
How severe is CVE-2026-74860?: High severity. CVSS v3 base score is 8.5 out of 10.