CVE-2026-28684

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 28/100
Published: 2026-04-20 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: Required
S: Unchanged
C: None
I: High
A: High

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.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
saurabh-kumar python-dotenv < 1.2.2

Bug Bounty Relevance

28 / 100
✓ Low complexity

CVSS Score

6.6 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

EPSS — Exploitation Probability

0.25%
Raw Score 0.002520
Percentile 16.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00252
2026-10-28
0.00252

Intelligence Sources

nvd ref →