What is CVE-2026-57826?

CVE-2026-57826 is a critical-severity vulnerability in N/a, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2026-08-18.

How severe is CVE-2026-57826?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in N/a

CVE-2026-57826

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.

Vulnerability class: Improper Certificate Validation

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-57826?: CVE-2026-57826 is a critical-severity vulnerability in N/a, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2026-08-18.
How severe is CVE-2026-57826?: Critical severity. CVSS v3 base score is 9.8 out of 10.