JLSEC-2026-662

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-662.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-662.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-662

Upstream

CVE-2026-58050

EUVD-2026-39970

GHSA-mf77-5hj2-98w9

Published

2026-07-11T04:13:36.542Z

Modified

2026-07-11T04:19:52.421289717Z

Severity

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

Summary

libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey...

Details

libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation numattrs * sizeof(libssh2publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client.

Database specific

{
    "sources": [
        {
            "imported": "2026-07-10T13:58:54.300Z",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58050",
            "database_specific": {
                "status": "Analyzed"
            },
            "published": "2026-06-28T02:16:32.017Z",
            "id": "CVE-2026-58050",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-58050",
            "modified": "2026-06-30T20:27:36.860Z"
        },
        {
            "imported": "2026-07-10T13:59:00.465Z",
            "id": "GHSA-mf77-5hj2-98w9",
            "url": "https://api.github.com/advisories/GHSA-mf77-5hj2-98w9",
            "published": "2026-06-28T03:33:40Z",
            "html_url": "https://github.com/advisories/GHSA-mf77-5hj2-98w9",
            "modified": "2026-06-28T03:33:43Z"
        },
        {
            "imported": "2026-07-10T13:58:55.761Z",
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39970",
            "id": "EUVD-2026-39970",
            "published": "2026-06-28T01:32:53Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39970",
            "modified": "2026-06-29T12:27:17Z"
        }
    ],
    "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-2026-662.json"