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CVE-2026-12340

🗓️ 25 Jun 2026 19:36:21Reported by wolfSSLType 
cve
 cve
🔗 web.nvd.nist.gov👁 4 Views

Out-of-bounds heap read in certificate verification when computing the Subject Key Identifier; short keys can crash.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-12340
25 Jun 202619:36
attackerkb
Cvelist
CVE-2026-12340 Out-of-bounds heap read in SM2/SM3 certificate Subject Key Identifier computation
25 Jun 202619:36
cvelist
EUVD
EUVD-2026-39547
25 Jun 202619:36
euvd
NVD
CVE-2026-12340
25 Jun 202620:17
nvd
Positive Technologies
PT-2026-52564
25 Jun 202600:00
ptsecurity
[
  {
    "vendor": "wolfSSL",
    "product": "wolfSSL",
    "collectionURL": "https://github.com/wolfSSL/wolfssl",
    "versions": [
      {
        "status": "affected",
        "version": "5.6.4",
        "lessThanOrEqual": "5.9.1",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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25 Jun 2026 20:22Current
5.8Medium risk
Vulners AI Score5.8
CVSS 46.3
4