Vulnerability · Published Jun 25, 2026 · Assigned by wolfSSL
CVE-2026-6412Continued acceptance of SHA-1/MD5 digests in certificate processing
Low 2.3
In plain English
A low-severity broken cryptography 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 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)2.3Low
Exploit odds (30 days)0.1%top 98.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Certificate policy and RFC 8446 compliance concerns regarding the continued acceptance of SHA-1/MD5 in certificate processing.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | wolfssl | 5.9.2-r0 | ALPINE-CVE-2026-6412 |
| Debian:12 | wolfssl | no fix listed | DEBIAN-CVE-2026-6412 |
| Debian:13 | wolfssl | no fix listed | DEBIAN-CVE-2026-6412 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-6412 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-6412 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-6412 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-6412 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-6412 |
Affected products (as reported)
Weakness: CWE-327 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/U:Clear