# CVE-2026-70062: Windows Libarchive double free vulnerability

Source: https://junglewise.ai/threats/cve-2026-70062-double-free-in-windows-libarchive-allows-an-unauthorized-attacker  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-70062 · Severity: high · CVSS 8.1 · Published 2026-10-13

Libarchive is a library used to extract and manipulate archive files on Windows systems. A double-free memory vulnerability in the library allows an attacker on the network to execute arbitrary code on affected systems without authentication.

Technologies: [Libarchive](https://junglewise.ai/threats/technologies/libarchive). Vendors: [Libarchive](https://junglewise.ai/threats/vendors/libarchive).

## Quick answers

**Is CVE-2026-70062 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70062 being exploited in the wild.

**How severe is CVE-2026-70062?** High severity, with a CVSS score of 8.1, published 13 October 2026.

**Which products and versions are affected?** Libarchive <UNKNOWN>.

**Is there a fix for CVE-2026-70062?** 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-2026-70062 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-70062?** 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 double-free vulnerability exists in the Windows implementation of Libarchive, a library for reading and writing archive files. The flaw can be exploited remotely by sending a specially crafted archive file over the network, allowing code execution without requiring prior authentication or user interaction.

## Affected products

- Libarchive Libarchive <UNKNOWN>

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70062](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70062)

## Related threats

- [Windows Libarchive path traversal vulnerability](https://junglewise.ai/threats/cve-2026-69973-improper-limitation-of-a-pathname-to-a-restricted-directory-path)
- [Libarchive relative path traversal in Windows](https://junglewise.ai/threats/cve-2026-69968-relative-path-traversal-in-windows-libarchive-allows-an)
- [libarchive gzip writer heap buffer overflow in original-filename](https://junglewise.ai/threats/cve-2025-64031-libarchive-gzip-writer-heap-buffer-overflow-in-original-filename)
- [libarchive heap overflow in PAX SUN.holesdata parsing](https://junglewise.ai/threats/cve-2026-15028-libarchive-heap-overflow-in-pax-sun-holesdata-parsing)
- [libarchive double free in RAR5 reader](https://junglewise.ai/threats/cve-2026-14164-libarchive-double-free-in-rar5-reader)