JLSEC-2026-663

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-663.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-663.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-663

Upstream

CVE-2026-58051

EUVD-2026-39971

GHSA-c5f3-hwj2-xp5p

Published

2026-07-11T04:13:36.542Z

Modified

2026-07-11T04:19:53.480075944Z

Severity

8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize...

Details

libssh2 through 1.11.1 grows its publickey list with SSH2REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2publickeylistfree operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.

Database specific

{
    "sources": [
        {
            "imported": "2026-07-10T13:58:54.323Z",
            "id": "CVE-2026-58051",
            "database_specific": {
                "status": "Analyzed"
            },
            "published": "2026-06-28T02:16:32.153Z",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58051",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-58051",
            "modified": "2026-06-30T17:42:04.473Z"
        },
        {
            "imported": "2026-07-10T13:58:58.999Z",
            "html_url": "https://github.com/advisories/GHSA-c5f3-hwj2-xp5p",
            "id": "GHSA-c5f3-hwj2-xp5p",
            "published": "2026-06-28T03:33:40Z",
            "url": "https://api.github.com/advisories/GHSA-c5f3-hwj2-xp5p",
            "modified": "2026-06-28T03:33:40Z"
        },
        {
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39971",
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39971",
            "id": "EUVD-2026-39971",
            "published": "2026-06-28T01:32:54Z",
            "imported": "2026-07-10T13:58:55.738Z",
            "modified": "2026-06-29T12:50:00Z"
        }
    ],
    "license": "CC-BY-4.0"
}

References

Affected packages

Julia / LibSSH2_jll

Package

Name: LibSSH2_jll
Purl: pkg:julia/LibSSH2_jll?uuid=29816b5a-b9ab-546f-933c-edad1886dfa8

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.11.103+0

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-663.json"