Description
A directory traversal vulnerability in the SevenZipFile.extractall() function of the python library py7zr v0.20.0 and earlier allows attackers to write arbitrary files via extracting a crafted 7z file.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | py7zr | 0.11.3+dfsg-5 | — |
| Debian 13 | py7zr | 0.11.3+dfsg-5 | — |
| Debian 12 | py7zr | 0.11.3+dfsg-5 | — |
| Debian 11 | py7zr | 0.11.3+dfsg-1+deb11u1 | DSA-5652-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | py7zr | 0.11.3+dfsg-4ubuntu0.1 | USN-7030-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-py7zr | 0.20.8-2.6 | openSUSE-SU-2025:15101-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
0xless/CVE-2022-44900-demo-lab ★ 1 · Jan 21, 2023
Demo webapp vulnerable to CVE-2022-44900
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | py7zr | < 0.20.1 | 0.20.1 | GHSA-m8xw-9x5x-6vh3 |
Advisories 3
- DSA-5652-1 py7zr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-7030-1 py7zr vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2025:15101-1 python311-py7zr-0.20.8-2.6 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026