CVE-2026-86141
2.9 · LOWxmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.
Overview
CVE-2026-86141 is a low-severity vulnerability affecting xmlsoft libxml2. It was published on September 5, 2026 and has a CVSS 3.1 base score of 2.9 (LOW).
This vulnerability has a CVSS 3.1 base score of 2.9, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical description
xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.
Remediation
Check the references section for vendor advisories and patches from xmlsoft. Update libxml2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| xmlsoft | libxml2 | >= 0, < 2.15.4 | Affected |
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Frequently asked questions
What is CVE-2026-86141?
CVE-2026-86141 is a low-severity vulnerability affecting xmlsoft libxml2. It was published on September 5, 2026 and has a CVSS 3.1 base score of 2.9 (LOW).
How severe is CVE-2026-86141?
This vulnerability has a CVSS 3.1 base score of 2.9, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-86141?
Check the references section for vendor advisories and patches from xmlsoft. Update libxml2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-86141?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-86141 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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