CVE-2026-28684: Saurabh-Kumar Python-Dotenv

Medium severity, CVSS 6.6. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Saurabh-Kumar Python-Dotenv: before 1.2.2 (fixed in 1.2.2)

Published 2026-04-20. Last modified 2026-06-17.