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CVE-2026-59849 Libssh: libssh: denial of service via automatic certificate authentication loop

🗓️ 21 Jul 2026 14:08:15Reported by redhatType 
cvelist
 cvelist
🔗 www.cve.org👁 6 Views

Libssh denial of service due to infinite loop in automatic certificate authentication when certificates are missing or rejected.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-59849
21 Jul 202614:08
attackerkb
AlpineLinux
CVE-2026-59849
21 Jul 202614:08
alpinelinux
CVE
CVE-2026-59849
21 Jul 202614:08
cve
Debian CVE
CVE-2026-59849
21 Jul 202614:08
debiancve
EUVD
EUVD-2026-46263
21 Jul 202614:08
euvd
NVD
CVE-2026-59849
21 Jul 202615:16
nvd
OSV
DEBIAN-CVE-2026-59849
21 Jul 202612:48
osv
Positive Technologies
PT-2026-61948
21 Jul 202600:00
ptsecurity
RedhatCVE
CVE-2026-59849
21 Jul 202614:08
redhatcve
[
  {
    "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": "unaffected",
    "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": "unaffected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Hardened Images",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:hummingbird:1"
    ]
  }
]

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