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CVE-2026-28684

MEDIUM

6.6

Description

python-dotenv reads key-value pairs from a .env file and can set them as environment variables. Prior to version 1.2.2, `set_key()` and `unset_key()` in python-dotenv follow symbolic links when rewriting `.env` files, allowing a local attacker to overwrite arbitrary files via a crafted symlink when a cross-device rename fallback is triggered. Users should upgrade to v.1.2.2 or, as a workaround, apply the patch manually.

CVE Details

CVSS v3.1 Score6.6

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published4/20/2026

Last Modified4/20/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-59CWE-61

References

https://github.com/theskumar/python-dotenv/commit/790c5c02991100aa1bf41ee5330aca75edc51311(security-advisories@github.com)

https://github.com/theskumar/python-dotenv/releases/tag/v1.2.2(security-advisories@github.com)

https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94(security-advisories@github.com)

https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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