CVE-2026-28684 — Arbitrary File Access
CVE-2026-28684 — 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 craf
What This Means For You
- If your environment is affected by CWE-59, CWE-61, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-28684 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Arbitrary File Overwrite via python-dotenv symlink - CVE-2026-28684
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-28684 | vulnerability | CVE-2026-28684 |
| CWE-59 | weakness | CWE-59 |
| CWE-61 | weakness | CWE-61 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 20, 2026 at 20:16 UTC |
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