EUVD-2026-82327Severity by source
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/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
Local cache-write foothold and a TOCTOU race set AV:L/AC:H/PR:L; impact is integrity redirection of privileged writes (I:H) with minor availability (A:L) and no confidentiality (C:N).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
2DescriptionCVE.org
mport is the MidnightBSD Package Manager. Prior to 2.7.8, privileged package fetch and cache-cleaning operations used race-prone path handling across libmport/fetch.c, libmport/clean.c, libmport/util.c, libmport/bundle_read_install_pkg.c, libmport/delete_primative.c, and libexec/mport.create/mport.create.c. A local attacker with write access to a participating package cache or staging path could race path checks and replacement operations to redirect package downloads, cleanup, or install-related side effects outside the intended cache. The affected lifecycle helper paths also used shell-form invocation, increasing command-line interpretation risk during privileged helper execution. This issue is fixed in version 2.7.8.
AnalysisAI
Path-racing and shell-invocation weaknesses in the MidnightBSD mport package manager (all versions prior to 2.7.8) let a local, low-privileged attacker who can write to a participating package cache or staging path redirect privileged fetch, cache-clean, and install-related side effects outside the intended cache, and potentially influence command-line interpretation during privileged helper execution. The flaw spans libmport/fetch.c, clean.c, util.c, bundle_read_install_pkg.c, delete_primative.c, and libexec/mport.create/mport.create.c, and only becomes exploitable when a privileged mport operation runs concurrently so the attacker can win a timing-sensitive race; there is no remote reach and no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a LOCAL attacker (AV:L) who already holds low privileges (PR:L) AND has write access to a participating mport package cache or staging path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuinely LOW-to-MODERATE real-world risk despite the CWE-78 'Command Injection' framing. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: 2.7.8. … Detailed patch versions, workarounds, and compensating controls in full report. |
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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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