CVE-2022-44900

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 2.3% (82nd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.5%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
57
EG Risk 57/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation2% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.5%
EPSS %ILE
84th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 6, 2022

Last Modified

April 23, 2025

Advisory Details (2)

Auto-updated Aug 2, 2026
Patch available. Sources: github_commit.
generic

CVE-2022-44900: Path Traversal Vulnerability in py7zr | less on sec

https://lessonsec.com/cve/cve-2022-44900/
github_commit Patch Available

commit 1bb43f17515c (miurahr/py7zr)

Patch available: miurahr/py7zr v0.20.2 (contains commit 1bb43f17515c)

https://github.com/miurahr/py7zr/commit/1bb43f17515c7f69673a1c88ab9cc72a7bbef406

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-py7zr (0.11.3+dfsg-4ubuntu0.1) @ jammy2026-05-25ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
py7zr0.11.3+dfsg-1
  • every version up to 0.11.3+dfsg-1+deb11u1: fixed in 0.11.3+dfsg-1+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
py7zr—
  • every version up to 0.11.3+dfsg-5: fixed in 0.11.3+dfsg-5
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
py7zr—
  • every version up to 0.11.3+dfsg-5: fixed in 0.11.3+dfsg-5
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
py7zr—
  • every version up to 0.11.3+dfsg-5: fixed in 0.11.3+dfsg-5
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
py7zr0.0.3 ... v0.0.1 (252 versions)
  • every version up to 0.20.1: fixed in 0.20.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 171 total refreshes for this CVE.

  1. 2026-10-10 19:57 UTCEPSS rescore
  2. 2026-10-09 20:04 UTCEPSS rescore
  3. 2026-10-08 17:05 UTCEPSS rescore
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  11. 2026-09-30 16:09 UTCEG score recompute
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  17. 2026-09-24 04:43 UTCOSV refresh
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  1. 2026-09-11 14:50 UTCEPSS rescore
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  7. 2026-09-04 21:59 UTCOSV refresh
  8. 2026-09-04 13:57 UTCEPSS rescore
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  25. 2026-08-18 13:45 UTCEPSS rescore
  26. 2026-08-18 09:22 UTCOSV refresh
  27. 2026-08-17 13:44 UTCEPSS rescore
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  42. 2026-08-04 10:35 UTCEPSS rescore
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  44. 2026-08-03 04:27 UTCOSV refresh
  45. 2026-08-02 02:24 UTCEPSS rescore
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  58. 2026-07-23 02:15 UTCEG score recompute
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  60. 2026-07-22 14:06 UTCEPSS rescore
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  67. 2026-07-18 10:03 UTCEPSS rescore
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  69. 2026-07-16 13:49 UTCOSV refresh
  70. 2026-07-15 16:56 UTCEPSS rescore
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  73. 2026-07-13 22:28 UTCEPSS rescore
  74. 2026-07-13 06:11 UTCEPSS rescore
  75. 2026-07-12 05:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-44900?
CVE-2022-44900 is a critical vulnerability published on December 6, 2022. 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.
When was CVE-2022-44900 disclosed?
CVE-2022-44900 was first published on December 6, 2022, with the most recent update on April 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-44900 actively exploited?
CVE-2022-44900 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-44900?
CVE-2022-44900 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2022-44900?
A fix for CVE-2022-44900 is available: update to the fixed version the vendor names in its advisory.

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