CVE-2026-5027High· 8.8▾ MidnightPoC availableThe '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 ('../').
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 48.4 · likelihood 7.2 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 3 sources. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Aug 18.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
31%
31% → 36%
Exploit-DB · 7 GitHub repos · Nuclei ×1
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 ('../').
langflow < 1.9.0Upgrade past the affected range:
langflow 1.9.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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