CVE-2026-5027
Langflow - Path Traversal Arbitrary File Write via upload_user_file
HIGH 8.8EPSS 4.8%
The 'POST /api/v2/files' endpoint does not sanitize the 'filename' parameter from the multipart form data, allowing an attacker to write files to arbitrary locations on the filesystem using path traversal sequences ('../').
- Affected
- langflow-ai · langflow
- CVSS v3.1 TENABLE
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 4.76% chance of exploitation in the next 30 days, 92nd percentile
- Nuclei
- high · CWE-22
- Published
- 2026-03-27
Proof-of-concept exploits (8)
- yahiahamza/CVE-2026-50274★ · 2026-04-02
- EQSTLab/CVE-2026-50273★ · 2026-04-24
- min8282/CVE-2026-50270★ · 2026-04-03
- HORKimhab/CVE-2026-50270★ · 2026-06-11
- Layer-6/CVE-2026-5027-Langflow0★ · 2026-06-11
- 0xBlackash/CVE-2026-50270★ · 2026-04-03
- rmhowe425/POC-CVE-2026-50270★ · 2026-09-02
- yym8538/CVE-2026-50271★ · 2026-08-21