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CVE-2026-55200 libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

🗓️ 17 Jun 2026 19:03:15Reported by VulnCheckType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

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 ...

Related
Affected
Refs
ReporterTitlePublishedViews
Family
Circl
CVE-2026-55200
17 Jun 202622:58
circl
CVE
CVE-2026-55200
17 Jun 202619:03
cve
EUVD
EUVD-2026-37784
17 Jun 202619:03
euvd
NVD
CVE-2026-55200
17 Jun 202620:17
nvd
Positive Technologies
PT-2026-50528
17 Jun 202600:00
ptsecurity
Vulnrichment
CVE-2026-55200 libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c
17 Jun 202619:03
vulnrichment
[
  {
    "vendor": "libssh2",
    "product": "libssh2",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "versionType": "semver",
        "lessThanOrEqual": "1.11.1"
      },
      {
        "status": "unaffected",
        "version": "7acf3dfda80c91c3a8c9f2372546301d4a1a7a8",
        "versionType": "git"
      }
    ],
    "repo": "https://github.com/libssh2/libssh2"
  }
]

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17 Jun 2026 19:03Current
CVSS 3.18.1
CVSS 49.2
4