CVE-2022-44900Public exploitNetwork attack vector

Arbitrary file write via unresolved archive paths

Published Dec 6, 2022 · Updated Apr 23, 2025

Path traversal in py7zr 0.20.0 and earlier allows context-dependent attackers to write arbitrary files by supplying a crafted 7z archive. SevenZipFile.extractall() joined archive member names to the destination but checked lexical containment without resolving traversal components or symlink targets. Exploitation requires an application or user to extract the malicious archive; writes occur with that process's filesystem permissions.

CVSS severity9.1
Critical
EPSS probability2.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in py7zr 0.20.0 and earlier allows context-dependent attackers to write arbitrary files by supplying a crafted 7z archive. SevenZipFile.extractall() joined archive member names to the destination but checked lexical containment without resolving traversal components or symlink targets. Exploitation requires an application or user to extract the malicious archive; writes occur with that process's filesystem permissions.

The record

CVE
CVE-2022-44900
Published
Dec 6, 2022
Updated
Apr 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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