Cyber Resilience

CVE-2026-9645

CriticalRCEUpdated

Published: 28 May 2026

Published
28 May 2026
Modified
17 June 2026
KEV Added
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Patch
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CVSS Score v3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.0032 23.4th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-9645 is a critical-severity OS Command Injection (CWE-78) vulnerability. Its CVSS base score is 9.9 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

Exposed methods allow authenticated users to create and execute arbitrary JavaScript code on the server. The scripts execute with full access, enabling complete system compromise as commands are executed as root.

CWE(s)
CWE-78

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 →
T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
Why these techniques?

Exposed server-side JS execution (CWE-78) directly enables public app exploitation (T1190), JS interpreter abuse for RCE (T1059.007), and root-level privilege escalation (T1068).

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

CVEs Like This One

CVE-2026-41553Shared CWE-78
CVE-2025-60963Shared CWE-78
CVE-2026-27635Shared CWE-78
CVE-2026-3692Shared CWE-78
CVE-2025-54404Shared CWE-78
CVE-2025-56077Shared CWE-78
CVE-2026-28773Shared CWE-78
CVE-2026-1427Shared CWE-78
CVE-2025-56102Shared CWE-78
CVE-2021-47816Shared CWE-78

Affected Assets

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References