EUVD-2026-82323Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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 package install with admin interaction (AV:L/UI:R); attacker needs no prior privileges (PR:N); arbitrary root file write gives I:H, minor A:L, no confidentiality impact.
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, create_sample_file() in libmport/bundle_read_install_pkg.c did not constrain absolute source and destination paths from the sample-file manifest directive to mport->root. A malicious or malformed package manifest could therefore direct privileged sample-file handling to copy or write outside the configured installation root, compromising local filesystem integrity. This issue is fixed in version 2.7.8.
AnalysisAI
Path traversal in MidnightBSD mport before 2.7.8 allows a crafted package manifest to make the privileged sample-file handler write or copy files outside the configured installation root, corrupting arbitrary local files. Exploitation requires a system administrator to install the malicious or malformed package with sufficient privileges (typically root) and to interact with the install, so it is a local, user-interaction-gated integrity flaw rather than a remote unauthenticated attack; no public exploit has been identified at time of analysis.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a MidnightBSD system administrator install a maliciously crafted or malformed mport package (running mport's privileged install path as root) whose sample-file manifest directive specifies an absolute source/destination path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but tightly-gated integrity flaw, not a broadly-exploitable network threat. … 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. |
Threat intelligence, references, and detailed analysis are available after sign-in.
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External POC / Exploit Code
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