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CVE PROGRAM SOURCE RECORD6.6 Medium

CVE-2026-28684

python-dotenv: Symlink following in set_key allows arbitrary file overwrite via cross-device rename fallback

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

theskumar python-dotenv

  • < 1.2.2affected

References