Critical Vulnerability in 7zip and p7zip Packages: CVE-2026-14266

7zip Updated 22 Oct 2026

Summary

17/07/2026

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

DEBIAN-CVE-2026-14266: ... Affects 7zip versions 22.01+dfsg-10~exp1 – 26.02+dfsg-2. No fix is published. How to fix ↓

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Background

7zip is a popular open-source file archiver that supports various archive formats and is known for its high compression ratio. p7zip is the Unix port of 7zip, providing similar functionality on Linux systems. Both packages are widely used for file compression and decompression tasks. The vulnerability identified as CVE-2026-14266 affects multiple versions of these packages across different Debian distributions, potentially exposing users to security risks.

Vulnerability Detail

CVE-2026-14266 is a critical vulnerability that arises from improper handling of certain inputs, which could allow an attacker to execute arbitrary code or cause a denial of service. This vulnerability affects the 7zip and p7zip packages across several Debian distributions, including Bullseye, Bookworm, Trixie, and Forky. The issue originates from a flaw in the code that processes compressed files, making it susceptible to crafted inputs that exploit this weakness.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

As a temporary workaround, users can avoid using the affected versions of 7zip and p7zip until they can apply the updates. Additionally, users should refrain from opening untrusted compressed files that could exploit this vulnerability.

Conclusion

CVE-2026-14266 is a significant vulnerability affecting the 7zip and p7zip packages across multiple Debian distributions. Users are strongly advised to update to the patched versions to mitigate potential security risks. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.

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