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CVE-2026-56820

🗓️ 21 Jul 2026 22:26:16Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 6 Views

OCSP replay flaw in Netty: OcspClient fails CertificateID validation; fixed in 4.1.136.Final and 4.2.16.Final.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-56820
21 Jul 202622:26
attackerkb
Circl
CVE-2026-56820
22 Jul 202602:59
circl
Cvelist
CVE-2026-56820 Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks
21 Jul 202622:26
cvelist
EUVD
EUVD-2026-47582
21 Jul 202622:26
euvd
NVD
CVE-2026-56820
21 Jul 202623:17
nvd
Positive Technologies
PT-2026-63259
21 Jul 202600:00
ptsecurity
Vulners
Node
OR
nettynettyRange4.2.0.Final4.2.16.Final
nettynettyRange<4.1.136.Final
[
  {
    "vendor": "netty",
    "product": "netty",
    "versions": [
      {
        "version": ">= 4.2.0.Final, < 4.2.16.Final",
        "status": "affected"
      },
      {
        "version": "< 4.1.136.Final",
        "status": "affected"
      }
    ]
  }
]

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21 Jul 2026 23:17Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.17.4
6