Vulnerability · Published Apr 9, 2026 · Assigned by wolfSSL
CVE-2026-54481-2 Byte Buffer Overflow in wolfSSL_X509_notAfter/notBefore
Low 2.3
In plain English
A low-severity heap buffer overflow in wolfSSL from wolfSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | wolfssl | 5.9.1-r0 | ALPINE-CVE-2026-5448 |
| Alpine:v3.24 | wolfssl | 5.9.1-r0 | ALPINE-CVE-2026-5448 |
| Debian:12 | wolfssl | no fix listed | DEBIAN-CVE-2026-5448 |
| Debian:13 | wolfssl | no fix listed | DEBIAN-CVE-2026-5448 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-5448 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-5448 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-5448 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-5448 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-5448 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Green