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CVE-2026-5503 out-of-bounds write in TLSX_EchChangeSNI via attacker-controlled publicName

🗓️ 09 Apr 2026 22:35:39Reported by wolfSSLType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

CVE-2026-5503: out-of-bounds write in TLSX_EchChangeSNI from attacker-controlled publicName due to unconditional extensions and cleanup flaw.

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Refs
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ANT-2026-0JRYQPCF · wolfSSL · heap-buffer-overflow
29 Mar 202620:42
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9 Apr 202600:00
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9 Apr 202622:35
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Debian CVE
CVE-2026-5503
9 Apr 202622:35
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EUVD
EUVD-2026-21234
10 Apr 202600:30
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NVD
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9 Apr 202623:17
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OSV
DEBIAN-CVE-2026-5503
9 Apr 202623:17
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OSV
UBUNTU-CVE-2026-5503
9 Apr 202623:17
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Rows per page
[
  {
    "vendor": "wolfSSL",
    "product": "wolfSSL",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThanOrEqual": "5.9.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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