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CVE-2026-59846 Libssh: libssh: information disclosure via proxycommand %r username expansion

🗓️ 21 Jul 2026 12:55:56Reported by redhatType 
cvelist
 cvelist
🔗 www.cve.org👁 39 Views

Libssh ProxyCommand username expansion via %r can inject shell metacharacters, exposing environment variables.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-59846
21 Jul 202612:55
attackerkb
alpinelinux
AlpineLinux
CVE-2026-59846
21 Jul 202612:55
alpinelinux
circl
Circl
CVE-2026-59846
21 Jul 202614:35
circl
cve
CVE
CVE-2026-59846
21 Jul 202612:55
cve
debian
Debian
[SECURITY] [DSA 6410-1] libssh security update
2 Aug 202607:37
debian
debiancve
Debian CVE
CVE-2026-59846
21 Jul 202612:55
debiancve
nessus
Tenable Nessus
Debian dsa-6410 : libssh-4 - security update
2 Aug 202600:00
nessus
nessus
Tenable Nessus
Fedora 43 : libssh (2026-063caa9112)
23 Jul 202600:00
nessus
nessus
Tenable Nessus
Fedora 44 : libssh (2026-0e46c91ccf)
23 Jul 202600:00
nessus
nessus
Tenable Nessus
openSUSE 16 Security Update : libssh (openSUSE-SU-2026:21444-1)
27 Jul 202600:00
nessus
Rows per page
[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Hardened Images",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "packageName": "libssh-main",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0.12.1-4.hum1",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:hummingbird:1"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:10"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  }
]

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