Python CVE-2026-28684

EUVD-2026-23901 MEDIUM

Improper Link Resolution Before File Access (CWE-59)

2026-04-20 GitHub_M

GHSA-mf9w-mj56-hr94

Python Information Disclosure

6.6

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Apr 20, 2026 - 17:54 vuln.today

Patch available

Apr 20, 2026 - 17:16 EUVD

DescriptionNVD

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.

AnalysisAI

Local privilege escalation in python-dotenv before version 1.2.2 allows authenticated users to overwrite arbitrary files via symlink following in the set_key() and unset_key() functions when a cross-device rename fallback is triggered. An attacker with local access and the ability to write to the filesystem can create malicious symlinks that python-dotenv will follow during .env file rewriting, leading to unintended file modification or deletion. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

CVE-2026-28684 vulnerability details – vuln.today

Back