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.
History

Mon, 20 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 20 Apr 2026 16:45:00 +0000

Type Values Removed Values Added
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.
Title python-dotenv: Symlink following in set_key allows arbitrary file overwrite via cross-device rename fallback
Weaknesses CWE-59
CWE-61
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-20T16:25:12.302Z

Updated: 2026-04-20T17:43:09.477Z

Reserved: 2026-03-02T21:43:19.927Z

Link: CVE-2026-28684

cve-icon Vulnrichment

Updated: 2026-04-20T17:42:50.526Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-20T17:16:33.087

Modified: 2026-04-20T19:03:07.607

Link: CVE-2026-28684

cve-icon Redhat

No data.