CVE-2026-42196
CVE-2026-42196 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.9. 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: Critical (CVSS 4.0 base score 9.9)
- EPSS exploit prediction: 1% (43rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-29832
- Weakness: CWE-22
- Published:
- Last modified:
Description
django-s3file is a lightweight file upload input for Django and Amazon S3. Prior to 7.0.2, S3FileMiddleware is vulnerable to relative path traversal attacks, where an attacker can use a modified request to escape pre-signed upload locations and have the Django application load files from random locations into request.FILES. Depending on how files are handled, this may lead to confidentiality and integrity issues. This vulnerability is fixed in 7.0.2.
Frequently asked questions
- What is CVE-2026-42196?
- django-s3file is a lightweight file upload input for Django and Amazon S3. Prior to 7.0.2, S3FileMiddleware is vulnerable to relative path traversal attacks, where an attacker can use a modified request to escape pre-signed upload locations and have the Django application load files from random locations into request.FILES. Depending on how files are handled, this may lead to confidentiality and integrity issues. This vulnerability is fixed in 7.0.2.
- How severe is CVE-2026-42196?
- CVE-2026-42196 has a CVSS 4.0 base score of 9.9, rated critical severity.
- Is CVE-2026-42196 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-42196?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-42196 have an EU (EUVD) identifier?
- Yes. CVE-2026-42196 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29832.
- When was CVE-2026-42196 published?
- CVE-2026-42196 was published on 2026-05-12 and last updated on 2026-06-17.
References
Other CWE-22 (Path Traversal) vulnerabilities
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