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Public proof of conceptFix available

CVE-2022-44900

A public proof of concept exists; no exploitation attested.

  • Published2022-12-06
  • Fixed in0.20.1
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-12-0620:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-44900?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-44900?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Py7zr project py7zr
BranchAffectedFixed in
0.20< 0.20.10.20.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • py7zrUbuntu:22.04:LTSall versions · fixed in 0.11.3+dfsg-4ubuntu0.1
  • py7zrDebian:14all versions · fixed in 0.11.3+dfsg-5
  • py7zrDebian:13all versions · fixed in 0.11.3+dfsg-5
  • py7zrDebian:12all versions · fixed in 0.11.3+dfsg-5
  • py7zrDebian:11all versions · fixed in 0.11.3+dfsg-1+deb11u1
  • python-py7zropenSUSE:Tumbleweedall versions · fixed in 0.20.8-2.6

Full record on NVD

Fix

  1. Update Py7zr project py7zr to 0.20.1

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverified0xless/CVE-2022-44900-demo-lab
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2022-12-06
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-m8xw-9x5x-6vh3

Frequently asked questions

What is CVE-2022-44900?

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.

Is CVE-2022-44900 actively exploited?

Active exploitation of CVE-2022-44900 has not been confirmed. Its EPSS score was 2.5% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-44900?

CVE-2022-44900 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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Same product first, then the same vendor advisory and the same publication week.

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Sources for this record