Quick answers
- Is CVE-2026-69639 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69639 being exploited in the wild.
- How severe is CVE-2026-69639?
- Critical severity, with a CVSS score of 9.8, published 13 October 2026.
- Which products and versions are affected?
- Libarchive <UNKNOWN>.
- Is there a fix for CVE-2026-69639?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-69639 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-69639?
- Check whether you run Libarchive at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer overflow exists in Libarchive's archive processing code on Windows platforms, reachable via network-supplied archive files without authentication or user interaction required. An attacker can craft a malicious archive to overflow heap memory, achieving arbitrary code execution with the privileges of the application using Libarchive.
Affected products
- Libarchive <UNKNOWN>
Timeline
- 2026-10-13: disclosed