CVE-2026-2097

High

Published: 10 February 2026

Published

10 February 2026

Modified

13 February 2026

KEV Added

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Patch

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CVSS Score v4 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Score 0.0044 34.9th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-2097 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Flowring Agentflow. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 34.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-2097 is an Arbitrary File Upload vulnerability in Agentflow, a product developed by Flowring. Published on 2026-02-10, it enables authenticated remote attackers to upload web shell backdoors and execute arbitrary code on the affected server. The vulnerability is rated 8.8 on the CVSS 3.1 scale (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-434 (Unrestricted Upload of File with Dangerous Type).

Attackers with low-privilege authenticated access can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation allows them to upload malicious files that function as web shells, granting high-impact arbitrary code execution on the server, potentially compromising confidentiality, integrity, and availability.

Mitigation details are provided in advisories from the Taiwan CERT, available at https://www.twcert.org.tw/en/cp-139-10700-3534d-2.html and https://www.twcert.org.tw/tw/cp-132-10699-49c0b-1.html.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-6872

Vulnerability details

Agentflow developed by Flowring has an Arbitrary File Upload vulnerability, allowing authenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.

CWE(s): CWE-434

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1505.003 Web Shell Persistence

Adversaries may backdoor web servers with web shells to establish persistent access to systems.

attack.mitre.org →

Why these techniques?

The vulnerability allows authenticated attackers to upload web shells for arbitrary code execution, directly facilitating T1190 (Exploit Public-Facing Application) via the file upload flaw in a network-accessible product and T1100 (Web Shell) as explicitly described.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0