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

2026-07-25T18:23:59.098947883Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS Calculator
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/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 CVSS Calculator

Summary

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

Details

libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free 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": [
        {
            "modified": "2026-06-30T17:42:04.473Z",
            "database_specific": {
                "status": "Analyzed"
            },
            "id": "CVE-2026-58051",
            "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",
            "imported": "2026-07-17T22:21:43.694Z",
            "published": "2026-06-28T02:16:32.153Z"
        },
        {
            "modified": "2026-06-28T03:33:40Z",
            "html_url": "https://github.com/advisories/GHSA-c5f3-hwj2-xp5p",
            "id": "GHSA-c5f3-hwj2-xp5p",
            "url": "https://api.github.com/advisories/GHSA-c5f3-hwj2-xp5p",
            "imported": "2026-07-17T22:21:43.936Z",
            "published": "2026-06-28T03:33:40Z"
        },
        {
            "modified": "2026-06-29T12:50:00Z",
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39971",
            "id": "EUVD-2026-39971",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39971",
            "imported": "2026-07-17T22:21:53.763Z",
            "published": "2026-06-28T01:32:54Z"
        }
    ],
    "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"