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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Weakness classification (CWE)
References
- github.com/openHiTLS/openHiTLS/compare/openhitls-0.3.2...openhitls-0.3.3
- www.openhitls.net/zh/support/HTLS-2026-001.html
- github.com/openHiTLS/openHiTLS/commit/4355cdf5b043d5b9ef698f8f57860f77f8e92561
- github.com/openHiTLS/openHiTLS/commit/2d3b221d113b452bc197012b185978b8314ee8a4
- gitcode.com/openHiTLS/openhitls/pull/1399
- gitcode.com/openHiTLS/openhitls/pull/1657
Frequently asked questions
- What is CVE-2026-57826?
- CVE-2026-57826 is a medium-severity vulnerability in N/a, classified under Improper Certificate Validation. CVSS score: 6.8/10. Published 2026-08-18.
- How severe is CVE-2026-57826?
- Medium severity. CVSS v3 base score is 6.8 out of 10.