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CVE-2026-40194 phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals()

🗓️ 10 Apr 2026 20:24:06Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 32 Views

CVE-2026-40194: phpseclib's SSH2 get_binary_packet uses != for HMAC comparison, causing variable-time checks; fixed in versions 3.0.51, 2.0.53, and 1.0.28.

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Rows per page
[
  {
    "vendor": "phpseclib",
    "product": "phpseclib",
    "versions": [
      {
        "version": ">= 0.1.1, < 1.0.28",
        "status": "affected"
      },
      {
        "version": ">= 2.0.0, < 2.0.53",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0, < 3.0.51",
        "status": "affected"
      }
    ]
  }
]

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