# CVE-2026-6450: wolfssl: A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, al...

CVE-2026-6450 is fixed in wolfssl on 1 platform, first by DEBIAN-CVE-2026-6450, released July 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-6450
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 25, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | wolfssl Debian 12.15 (bookworm) | 5.5.4-2+deb12u3 | [DEBIAN-CVE-2026-6450](https://patchblox.com/security/data/fix/linux/debian-cve-2026-6450.md) | Jul 18, 2026 |
| Linux | wolfssl Debian 13.5 (trixie) | 5.7.2-0.1+deb13u2 | [DEBIAN-CVE-2026-6450](https://patchblox.com/security/data/fix/linux/debian-cve-2026-6450.md) | Jul 18, 2026 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.