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CVE-2026-74860

HIGHCVSS 8.5/10EPSS 0.66%

Last modified

CVE-2026-74860 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. 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. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.5/10

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

EPSS Probability
0.66%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Red HatRed Hat Enterprise Linux 10All versions
Red HatRed Hat Enterprise Linux 10.0 Extended Update SupportAll versions
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle SupportAll versions
Red HatRed Hat Enterprise Linux 8All versions
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportAll versions
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnAll versions
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportAll versions
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnAll versions
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceAll versions
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsAll versions
Red HatRed Hat Enterprise Linux 9All versions
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP SolutionsAll versions
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP SolutionsAll versions
Red HatRed Hat Enterprise Linux 9.6 Extended Update SupportAll versions
Red HatCert Manager support for Red Hat OpenShift release 1.20All versions
Red HatRed Hat Cost Management On-Premise 1All versions
Red HatRed Hat Hardened ImagesAll versions
Red HatRed Hat OpenShift AI 3.0All versions
Red HatRed Hat OpenShift AI 3.4All versions
Red HatRed Hat OpenShift AI 3.5All versions
Red HatRed Hat Update Infrastructure 5All versions
Red HatRed Hat Enterprise Linux 6All versions

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is 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.
How severe is CVE-2026-74860?
CVE-2026-74860 has a CVSS score of 8.5/10 (HIGH severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74860?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST