CVE-2026-5027 | langflow-ai langflow Multipart Form Data Parser /api/v2/files filename path traversal

VDB-353945 · CVE-2026-5027 · GCVE-0-2026-5027 LANGFLOW-AI LANGFLOW MULTIPART FORM DATA PARSER /API/V2/FILES FILENAME PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $0-$5k 1.60 Summaryinfo A vulnerability marked as critical has been reported in langflow-ai langflow. This impacts an unknown function of the file /api/v2/files of the component Multipart Form Data Parser. The manipulation of the argument filename leads to path traversal. This vulnerability is referenced as CVE-2026-5027. Remote exploitation of the attack is possible. No exploit is available. Detailsinfo A vulnerability, which was classified as critical, has been found in langflow-ai langflow (the affected version is unknown). This issue affects an unknown code of the file /api/v2/files of the component Multipart Form Data Parser. The manipulation of the argument filename with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is: 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 ('../'). The advisory is shared at tenable.com. The identification of this vulnerability is CVE-2026-5027 since 03/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/27/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Artificial Intelligence Software Vendor langflow-ai Name langflow CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.6 VulDB Meta Temp Score: 7.6 VulDB Base Score: 6.3 VulDB Temp Score: 6.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.8 CNA Vector (tenable): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/27/2026 Advisory disclosed 03/27/2026 +0 days CVE reserved 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: tenable.com Status: Not defined CVE: CVE-2026-5027 (🔒) GCVE (CVE): GCVE-0-2026-5027 GCVE (VulDB): GCVE-100-353945 Entryinfo Created: 03/27/2026 16:57 Changes: 03/27/2026 16:57 (64) Complete: 🔍 Cache ID: 99:C2C:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸