CVE-2026-54587

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-54587
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54587.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54587
Aliases
  • GHSA-f69w-h3gh-r86p
Published
2026-09-17T16:56:33Z
Modified
2026-09-19T08:08:52Z
Severity
  • 5.8 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
mport directory asset installation is vulnerable to symlink and path traversal races
Details

mport is the MidnightBSD Package Manager. Prior to 2.7.8, directory assets handled as ASSET_DIR or ASSET_DIR_OWNER_MODE in libmport/bundle_read_install_pkg.c used path-based mport_mkdirp(), ownership, and permission operations. A local attacker able to modify part of the target installation tree could use dot-dot traversal or substitute symlinks during privileged package installation, causing directory creation or attribute changes to affect attacker-selected paths outside the intended package directories. This issue is fixed in version 2.7.8.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-367",
        "CWE-59"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54587.json"
}
References

Affected packages

Git / github.com/midnightbsd/mport

Affected ranges

Type
GIT
Repo
https://github.com/midnightbsd/mport
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a4fa996df1fbebeff3691e1b512c807b5f414b5d
Fixed
899c8fe2d3ceb25d899e70dbd0c7744b7d7a0946
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.7.8"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

2.*
2.0
2.0.1
2.0.2
2.0.5
2.0.6
2.0.7
2.0.8
2.0.9
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.1.9
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.2.9
2.2.9.1
2.3.0
2.4.0
2.4.1
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4.8
2.5.0
2.5.1
2.6.0
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.7
2.6.8
2.7.0
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.7.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54587.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "273879649370528359633369040355302077908",
            "length":  12968
        },
        "id":  "CVE-2026-54587-58880e31",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/a4fa996df1fbebeff3691e1b512c807b5f414b5d",
        "target":  {
            "file":  "libmport/bundle_read_install_pkg.c",
            "function":  "do_actual_install"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "247589987726746325858252768047395901414",
                "85110944689467071390478369938953128540",
                "334059552197735911674953748933162727719",
                "84418276495848716430697223631848291592",
                "251513046928623140930349664259743105005",
                "15923453367996652233543667415127648083",
                "122581282915587375511083626131924869387",
                "136147306971487474313684887000585263042",
                "27801033883486089296011638027625808254",
                "281477884607626951301336993794825079163",
                "283309439026388425450719454236007727371",
                "310831995576328460998020759664515884830",
                "322447970313839566193073802391293415801",
                "288153280451947193788201899312369862403",
                "333276549649370220790586416937720199888",
                "303581277548607180783490328410836094122",
                "228382518862607039602848239494656585631",
                "261830825737066141554685128340047761038",
                "182662033553058823993814735534426391851",
                "111220226908254604981781534264361306637",
                "28728194287592324071433920368470177140",
                "89691815881692885517821483301613564084",
                "10481309939113439731867500159543157812",
                "237114357607854133385642174660608532861",
                "55393058762042666392671566907043646499",
                "290821109420824853884881891095429503570",
                "7975601657896050877704190418938187467",
                "322331822835267518387682007855959913698",
                "77692840770860585544137683042439545819",
                "177082296658238902279550327830442667333",
                "44280046826561879818022012171412995714",
                "80099769382666814590990311215882208258",
                "248770153739010248102458058064910045928",
                "801816654788639718714790983926569436",
                "156390700518445005167807330364786549564",
                "256948144823956186102351014485720855517",
                "223396170186950725190638946203071859535",
                "319239402826866656831492415475652350547",
                "162835751527833135751737816012037722339",
                "310530348002095143863049728034417114383",
                "43727686388175511964213996514301625459",
                "217836203986792809553910548989358126308",
                "203505401932696560661441172690544946090",
                "75656759996711869196438986471410762113",
                "201777676631909288720881109354701366482",
                "196642594347753815883493935738550820366",
                "6977453662715580935295809342697262178",
                "255701934642260781679348721702993287131",
                "224750448461119420259956997721934842462",
                "171175313986874095191569904631007111415",
                "323467244543209055678315655484099312459",
                "280688358876419210757182425082319654804",
                "30394221225023563769882583736654665247"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-54587-d56ec383",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/a4fa996df1fbebeff3691e1b512c807b5f414b5d",
        "target":  {
            "file":  "libmport/bundle_read_install_pkg.c"
        }
    }
]
vanir_signatures_modified 
"2026-09-19T08:08:52Z"