CVE-2026-5448

MEDIUM

1-2 Byte Buffer Overflow in wolfSSL_X509_notAfter/notBefore

Title source: cna

Description

X.509 date buffer overflow in wolfSSL_X509_notAfter / wolfSSL_X509_notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS or certificate verify operations in wolfSSL.

References (1)

Core 1

Core References

https://github.com/wolfSSL/wolfssl/pull/10071

Scores

CVSS v3 4.3

EPSS 0.0010

EPSS Percentile 0.9%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-122

Status published

Products (2)

wolfSSL/wolfSSL < 5.9.1

wolfssl/wolfssl < 5.9.1

Published Apr 10, 2026

Tracked Since Apr 10, 2026