CVE-2026-5121
7.5 · HIGHOverview
CVE-2026-5121 is a high-severity vulnerability affecting libarchive libarchive. It was published on March 30, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.
Remediation
Check the references section for vendor advisories and patches from libarchive. Update libarchive 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 |
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References
Frequently Asked Questions
What is CVE-2026-5121?
CVE-2026-5121 is a high-severity vulnerability affecting libarchive libarchive. It was published on March 30, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-5121?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-5121?
Check the references section for vendor advisories and patches from libarchive. Update libarchive 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-2026-5121?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-5121 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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