PT-2026-33800 · Theskumar · Python-Dotenv

Published 2026-04-20 · Updated 2026-04-20 · CVE-2026-28684

NVD

CVSS v3.1

6.6

Medium

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

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.

Fix

Link Following

Weakness Enumeration

CWE-59

CWE-61

Related Identifiers

CVE-2026-28684

Affected Products

Python-Dotenv

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-28684 · Security Note
• https://github.com/theskumar/python-dotenv/releases/tag/v1.2.2 · Note
• https://github.com/theskumar/python-dotenv/commit/790c5c02991100aa1bf41ee5330aca75edc51311 · Note
• https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94 · Note