← CVE Intelligence

CVE-2026-28684

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

Description (CNA)

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 (CNA)

Vendor / productVersions
theskumar / python-dotenvaffected < 1.2.2

CWE

CWE-59, CWE-61

References

ADP enrichment

CISA-ADP

No English description supplied.