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CVE-2026-5447

MEDIUM CVSS 4.0: 6.3 EPSS 0.04%
Updated Apr 09, 2026
Parameter Value
CVSS 6.3 (MEDIUM)
Type CWE-122 (Heap-based Buffer Overflow)
Public PoC No

Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer overflow occurs when converting an X.509 certificate internally due to incorrect size handling of the AuthorityKeyIdentifier extension.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v4.0