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CVE-2026-66035

🗓️ 24 Jul 2026 16:45:24Reported by VulnCheckType 
cve
 cve
🔗 web.nvd.nist.gov👁 12 Views

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

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-66035
24 Jul 202616:45
attackerkb
Circl
CVE-2026-66035
24 Jul 202620:01
circl
Cvelist
CVE-2026-66035 libssh2 Heap Buffer Overflow via ETM Cipher Negotiation
24 Jul 202616:45
cvelist
EUVD
EUVD-2026-48722
24 Jul 202616:45
euvd
NVD
CVE-2026-66035
24 Jul 202617:17
nvd
Positive Technologies
PT-2026-64382
24 Jul 202600:00
ptsecurity
Vulnrichment
CVE-2026-66035 libssh2 Heap Buffer Overflow via ETM Cipher Negotiation
24 Jul 202616:45
vulnrichment
Vulners
Node
libssh2libssh2Range01.11.1
[
  {
    "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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24 Jul 2026 19:17Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.17.5
CVSS 47.7
SSVC
12