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CVE-2026-18798

🗓️ 25 Aug 2026 12:59:04Reported by opensslType 
cve
 cve
🔗 web.nvd.nist.gov👁 168 Views

OpenSSL QUIC server double free via malformed INITIAL packet with short DCID causing DoS.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
amazon
Amazon
Important: openssl
14 Sep 202600:00
amazon
alpinelinux
AlpineLinux
CVE-2026-18798
25 Aug 202612:59
alpinelinux
cgr
Chainguard
CVE-2026-18798 vulnerabilities
8 Sep 202620:54
cgr
circl
Circl
CVE-2026-18798
25 Aug 202615:58
circl
cvelist
Cvelist
CVE-2026-18798 QUIC Server May Trigger Double Free When Processing INITIAL Packet
25 Aug 202612:59
cvelist
debian
Debian
[SECURITY] [DSA 6465-1] openssl security update
25 Aug 202618:58
debian
debiancve
Debian CVE
CVE-2026-18798
25 Aug 202612:59
debiancve
nessus
Tenable Nessus
Debian dsa-6465 : libcrypto3-udeb - security update
25 Aug 202600:00
nessus
nessus
Tenable Nessus
OpenSSL 3.5.0 < 3.5.8 Multiple Vulnerabilities
13 Aug 202600:00
nessus
nessus
Tenable Nessus
OpenSSL 3.6.0 < 3.6.4 Multiple Vulnerabilities
5 Aug 202600:00
nessus
Rows per page
Vulners
Node
OR
opensslopensslRange4.0.04.0.2
opensslopensslRange3.6.03.6.4
opensslopensslRange3.5.03.5.8
[
  {
    "defaultStatus": "unaffected",
    "product": "OpenSSL",
    "vendor": "OpenSSL",
    "versions": [
      {
        "lessThan": "4.0.2",
        "status": "affected",
        "version": "4.0.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.6.4",
        "status": "affected",
        "version": "3.6.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.5.8",
        "status": "affected",
        "version": "3.5.0",
        "versionType": "semver"
      }
    ]
  }
]

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28 Aug 2026 19:46Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.5
EPSS0.01481
SSVC
168