CVE-2026-6450 CRL critical extension bypass in ParseCRL_Extensions
Attackers can bypass CRL critical extension checks in wolfSSL if CRL support is enabled and signatures are trusted, allowing revoked certificates to be accepted.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-6450?
CVE-2026-6450 is a low-severity vulnerability in Wolfssl Wolfssl, published on 25 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when parsed.
Weakness: CWE-295
Which versions are affected by CVE-2026-6450?
It affects 1 product.
Products include Wolfssl Wolfssl.
How do I fix CVE-2026-6450?
Apply the vendor's patch.
Is CVE-2026-6450 being exploited?
There is no known exploitation of CVE-2026-6450 in the wild and no public exploit code.
Other vulnerabilities in Wolfssl Wolfssl
Sources
Also known as DEBIAN-CVE-2026-6450, GHSA-qpch-gjf6-c9gf, JLSEC-2026-751, UBUNTU-CVE-2026-6450.