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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5447

⇱ NVD - CVE-2026-5447

  1. Vulnerabilities

CVE-2026-5447 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

CVSS-B 6.3 MEDIUM
Vector:  CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/wolfSSL/wolfssl/pull/10112 wolfSSL Inc. Issue Tracking  Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-122 Heap-based Buffer Overflow wolfSSL Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 6:59:02 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-04-10T18:07:18.012291Z","id":"CVE-2026-5447","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by wolfSSL Inc. 6/17/2026 6:59:02 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"wolfSSL","product":"wolfSSL","defaultStatus":"unaffected","programFiles":["src/x509.c"],"repo":"https://github.com/wolfSSL/wolfssl","versions":[{"version":"0","lessThan":"5.9.1","versionType":"semver","status":"affected"}]}]

Initial Analysis by NIST 4/29/2026 1:21:51 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Added CPE Configuration 
OR
 *cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* versions up to (excluding) 5.9.1
Added Reference Type 
wolfSSL Inc.: https://github.com/wolfSSL/wolfssl/pull/10112 Types: Issue Tracking, Patch

New CVE Received from wolfSSL Inc. 4/09/2026 5:16:13 PM

Action Type Old Value New Value
Added Description 
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.
Added CVSS V4.0 
AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Added CWE 
CWE-122
Added Reference 
https://github.com/wolfSSL/wolfssl/pull/10112

Quick Info

CVE Dictionary Entry:
CVE-2026-5447
NVD Published Date:
04/09/2026
NVD Last Modified:
06/17/2026
Source:
wolfSSL Inc.