CVE-2026-54581

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Source
https://cve.org/CVERecord?id=CVE-2026-54581
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54581.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54581
Aliases
  • GHSA-895r-rv8j-7g23
Published
2026-09-17T16:45:37Z
Modified
2026-10-28T11:14:36Z
Severity
  • 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
mport bootstrap index fetch can continue after hash verification failure
Details

mport is the MidnightBSD Package Manager. Prior to 2.7.8, the mport_fetch_bootstrap_index() function in libmport/fetch.c could return success when bootstrap index hash verification encountered a missing or invalid hash because the failure path did not preserve a fatal result. A network attacker or compromised mirror able to alter bootstrap index content or its transport path could therefore cause mport to proceed with an unverified or tampered bootstrap package index. This issue is fixed in version 2.7.8.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-345",
        "CWE-347"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54581.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
899c8fe2d3ceb25d899e70dbd0c7744b7d7a0946
Fixed
64ebf3f60dc3df72a3b47fbb20a7f8072c0a0f5e
Fixed
b3e11ba078351402082a881209ee6fda5d332e3d
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.7.8"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "64ebf3f60dc3df72a3b47fbb20a7f8072c0a0f5e"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "b3e11ba078351402082a881209ee6fda5d332e3d"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "2.7.8",
            "range":  [
                {
                    "fixed":  "899c8fe2d3ceb25d899e70dbd0c7744b7d7a0946"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

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-2026-54581.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "276186686669721583823167012656388562511",
                "219541036503213529366480024954147284260",
                "219867170193786606266529216094979479232",
                "314754098100687977375712053740569260673"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-54581-0120aa29",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/64ebf3f60dc3df72a3b47fbb20a7f8072c0a0f5e",
        "target":  {
            "file":  "libmport/fetch.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "273663711616624712904137650099031571974",
                "294425045695914500674190171101965667096",
                "87852885090537957491565621854760744324",
                "182138002652916283422132749411705081273",
                "133891235758763390135025935315507429585",
                "338853542523308733483014684765343142728",
                "207199073745177706665489780604859751366",
                "122092128584208768294794609550683178198",
                "337858432402960559802823748189594911313",
                "221843752473596697732056465781662527261",
                "142297238949626874537383624799227340961",
                "91057373537920558804273305304659679011",
                "257660415420928539487168048420879924442",
                "68255568272259003946998349206003701392",
                "311791982136376080149514111693465292710",
                "265018424889668156976643022915695394469",
                "112800010796803087182615053341756372216"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-54581-1e377afe",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
        "target":  {
            "file":  "libmport/util.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "228860771419624533693889587099451733372",
            "length":  1724
        },
        "id":  "CVE-2026-54581-9697aa24",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
        "target":  {
            "file":  "libmport/util.c",
            "function":  "mport_decompress_zstd"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "49002796473091456156458222690498865897",
            "length":  1195
        },
        "id":  "CVE-2026-54581-bde99094",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/64ebf3f60dc3df72a3b47fbb20a7f8072c0a0f5e",
        "target":  {
            "file":  "libmport/fetch.c",
            "function":  "mport_fetch_bootstrap_index"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "209395942731077130336847032314305746970",
            "length":  1848
        },
        "id":  "CVE-2026-54581-bf826610",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
        "target":  {
            "file":  "libmport/fetch.c",
            "function":  "mport_fetch_index"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "168883938179142272866881669702208103556",
            "length":  1165
        },
        "id":  "CVE-2026-54581-c0a107f3",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
        "target":  {
            "file":  "libmport/fetch.c",
            "function":  "mport_fetch_bootstrap_index"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "28155665265217389570373726260696265733",
                "270546140310395727864820072664402228878",
                "17189134069191075523197834239154910312",
                "44484155967387362857806185456147595087",
                "252824991807596761603464753526964202824",
                "242500639577386535065508131056626515885",
                "94449469585795167323269339478392859836",
                "45325448920302085866589026156451866140",
                "7449633375845181586455225165922152434",
                "287251875171957920869938498977625021603",
                "139701436355309232264874963606483723538",
                "13139320937628813329424206767234075353",
                "122491412888024131315075349147469244866"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-54581-fa360697",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/midnightbsd/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d",
        "target":  {
            "file":  "libmport/fetch.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T11:14:36Z"