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CVE-2026-66035

🗓️ 24 Jul 2026 16:45:24Reported by VulnCheckType 
cve
 cve
🔗 web.nvd.nist.gov👁 80 Views

Pre-authentication heap overflow in libssh2 during Encrypt-then-MAC negotiation enables heap corruption during handshake.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-66035
24 Jul 202616:45
attackerkb
alpinelinux
AlpineLinux
CVE-2026-66035
24 Jul 202616:45
alpinelinux
cbl_mariner
CBLMariner
CVE-2026-66035 affecting package libssh2 for versions less than 1.11.1-5
29 Jul 202620:30
cbl_mariner
circl
Circl
CVE-2026-66035
24 Jul 202620:01
circl
cvelist
Cvelist
CVE-2026-66035 libssh2 Heap Buffer Overflow via ETM Cipher Negotiation
24 Jul 202616:45
cvelist
debiancve
Debian CVE
CVE-2026-66035
24 Jul 202616:45
debiancve
euvd
EUVD
EUVD-2026-48722
24 Jul 202616:45
euvd
mscve
Microsoft CVE
libssh2 Heap Buffer Overflow via ETM Cipher Negotiation
26 Jul 202608:03
mscve
nvd
NVD
CVE-2026-66035
24 Jul 202617:17
nvd
nessus
Tenable Nessus
openSUSE 16 Security Update : libssh2_org (openSUSE-SU-2026:21549-1)
13 Aug 202600:00
nessus
Rows per page
NVD
Vulners
CNA
Node
libssh2libssh2Range1.11.1
[
  {
    "defaultStatus": "affected",
    "vendor": "libssh2",
    "product": "libssh2",
    "packageURL": "pkg:github/libssh2/libssh2",
    "repo": "https://github.com/libssh2/libssh2",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "versionType": "semver",
        "lessThanOrEqual": "1.11.1"
      },
      {
        "status": "unaffected",
        "version": "42e33d81577ed4b95d4b4f6f845e5ee8efe5eeb4",
        "versionType": "git"
      }
    ]
  }
]

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30 Jul 2026 15:41Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.17.5
CVSS 47.7
EPSS0.00318
SSVC
80