CVE-2026-57826 Security feature bypass in n/a
Attackers can bypass X.509 certificate chain verification for v1/v2 certificates by exploiting missing basic constraints checks in openHiTLS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57826?
CVE-2026-57826 is a medium-severity vulnerability in n/a, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in openHiTLS 0.2.0 through 0.3.2. In the X.509 certificate chain verification, the basic constraints extension and CA flag processing of intermediate CAs are only verified for v3 certificates, and v1/v2 certificates are ignored.
Weakness: CWE-295
Which versions are affected by CVE-2026-57826?
How do I fix CVE-2026-57826?
No fix has been published for CVE-2026-57826 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-57826 being exploited?
There is no known exploitation of CVE-2026-57826 in the wild and no public exploit code.
Sources
Also known as GHSA-3q3x-px7h-qhq2.