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CVE-2026-26994 uTLS ServerHellos are accepted without checking TLS 1.3 downgrade canaries

🗓️ 20 Feb 2026 02:50:18Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 24 Views

uTLS before 1.7.0 accepts downgraded Server Hello without canary check, enabling downgrade and fingerprinting.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-26994
20 Feb 202602:50
attackerkb
Chainguard
CVE-2026-26994 vulnerabilities
20 Feb 202601:17
cgr
CNNVD
uTLS 安全漏洞
20 Feb 202600:00
cnnvd
CVE
CVE-2026-26994
20 Feb 202602:50
cve
Debian CVE
CVE-2026-26994
20 Feb 202602:50
debiancve
EUVD
EUVD-2026-18218
2 Apr 202615:31
euvd
Github Security Blog
uTLS ServerHellos are accepted without checking TLS 1.3 downgrade canaries
23 Apr 202514:43
github
NVD
CVE-2026-26994
20 Feb 202603:16
nvd
OSV
CVE-2026-26994 uTLS ServerHellos are accepted without checking TLS 1.3 downgrade canaries
20 Feb 202602:50
osv
OSV
DEBIAN-CVE-2026-26994
20 Feb 202603:16
osv
Rows per page
[
  {
    "vendor": "refraction-networking",
    "product": "utls",
    "versions": [
      {
        "version": "< 1.7.0",
        "status": "affected"
      }
    ]
  }
]

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