CVEs / CVE-2026-5027
CVE-2026-5027: langflow-ai langflow vulnerability
- high 8.8 CVSS 3.1 (from the CNA)
- EPSS 39.9% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Description
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| langflow-ai langflow | all versions | — |
Exploitation
Not in the CISA Known Exploited Vulnerabilities catalog as of 30 Oct 2026.
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-22 |
References
- CVE-2026-5027 on NVD
- CVE-2026-5027 on OSV
- https://www.tenable.com/security/research/tra-2026-26 Vendor Advisory, Third Party Advisory
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.