CVE-2026-41140
CVE-2026-41140 is a high-severity vulnerability with a CVSS 3.x base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: High (CVSS 3.x base score 8.7)
- CVSS v4: 0.6
- EPSS exploit prediction: 0% (21st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-25578
- Weakness: CWE-22
- Published:
- Last modified:
Description
Poetry is a dependency manager for Python. Prior to 2.3.4, the extractall() function in src/poetry/utils/helpers.py:410-426 extracts sdist tarballs without path traversal protection on Python versions where tarfile.data_filter is unavailable. Considering only Python versions which are still supported by Poetry, these are 3.10.0 - 3.10.12 and 3.11.0 - 3.11.4. This vulnerability is fixed in 2.3.4.
Frequently asked questions
- What is CVE-2026-41140?
- Poetry is a dependency manager for Python. Prior to 2.3.4, the extractall() function in src/poetry/utils/helpers.py:410-426 extracts sdist tarballs without path traversal protection on Python versions where tarfile.data_filter is unavailable. Considering only Python versions which are still supported by Poetry, these are 3.10.0 - 3.10.12 and 3.11.0 - 3.11.4. This vulnerability is fixed in 2.3.4.
- How severe is CVE-2026-41140?
- CVE-2026-41140 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
- Is CVE-2026-41140 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-41140?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-41140 have an EU (EUVD) identifier?
- Yes. CVE-2026-41140 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25578.
- When was CVE-2026-41140 published?
- CVE-2026-41140 was published on 2026-04-24 and last updated on 2026-06-30.
References
- https://github.com/python-poetry/poetry/security/advisories/GHSA-73h3-mf4w-8647
- https://access.redhat.com/errata/RHSA-2026:24866
- https://access.redhat.com/security/cve/CVE-2026-41140
- https://bugzilla.redhat.com/show_bug.cgi?id=2461604
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41140.json
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