EUVD-2026-16668Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
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 ('../').
AnalysisAI
Arbitrary file write vulnerability in an API endpoint (POST /api/v2/files) enables authenticated remote attackers to overwrite critical system files or place malicious executables in startup directories through unvalidated filename parameters containing path traversal sequences. The vulnerability carries a CVSS score of 8.8 (High) with network-accessible attack vector requiring low-level privileges and no user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires authenticated user access to the target application. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is substantial based on multiple converging signals. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated attacker with low-level API access crafts a malicious file upload request to POST /api/v2/files with a filename parameter containing path traversal sequences such as '../../../etc/cron.d/malicious' or '..\..\..\Windows\System32\evil.dll'. The vulnerable endpoint processes this unsanitized input and writes the uploaded file content to the specified location outside the intended upload directory. … |
| Remediation | Consult the Tenable Security Research advisory TRA-2026-26 at https://www.tenable.com/security/research/tra-2026-26 for vendor-specific patch availability and upgrade guidance, as no fix version has been specified in the available intelligence. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems and applications exposing the affected API endpoint; restrict network access to POST /api/v2/files to trusted internal networks only and disable the endpoint if not actively required. …
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