Medium severity · published Jun 25, 2026
CVE-2026-6412
Continued acceptance of SHA-1/MD5 digests in certificate processing
4.3
CVSS
0.1%
EPSS
No
On KEV
Description
Certificate policy and RFC 8446 compliance concerns regarding the continued acceptance of SHA-1/MD5 in certificate processing.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
wolfSSL · wolfSSL
3.9.10 through 5.9.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6412
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6412
Issue Tracking
https://github.com/wolfSSL/wolfssl/pull/10222
Vendor Advisory
https://www.wolfssl.com/docs/security-vulnerabilities/
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