JLSEC-2026-661

See a problem?
Please try reporting it to the source first.

Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-661.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-661.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-661

Upstream

CVE-2026-55200

EUVD-2026-37784

GHSA-r8mh-x5qv-7gg2

Published

2026-07-10T13:57:40.607Z

Modified

2026-07-25T18:24:44.799211143Z

Severity

8.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L CVSS Calculator
9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in...

Details

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.

Database specific

{
    "sources": [
        {
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55200",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-55200",
            "modified": "2026-07-14T22:17:17.183Z",
            "id": "CVE-2026-55200",
            "imported": "2026-07-17T22:21:25.484Z",
            "published": "2026-06-17T20:17:28.667Z",
            "database_specific": {
                "status": "Analyzed"
            }
        },
        {
            "html_url": "https://github.com/advisories/GHSA-r8mh-x5qv-7gg2",
            "modified": "2026-06-30T15:30:33Z",
            "published": "2026-06-17T21:34:39Z",
            "imported": "2026-07-17T22:21:25.640Z",
            "id": "GHSA-r8mh-x5qv-7gg2",
            "url": "https://api.github.com/advisories/GHSA-r8mh-x5qv-7gg2"
        },
        {
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-37784",
            "modified": "2026-07-14T21:33:55Z",
            "id": "EUVD-2026-37784",
            "imported": "2026-07-17T22:21:33.410Z",
            "published": "2026-06-17T19:03:15Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-37784"
        }
    ],
    "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

1.11.102+0

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-661.json"