An issue was discovered in openHiTLS 0.2.0 through 0.3.2.

published 2026-08-18 2mo ago modified 2026-11-09 2d ago also EUVD-2026-61278

cvss: 6.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits: 0; none known

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.

Patch / fix

links 4

github.com/openHiTLS/openHiTLS@4355cdf commit
github.com/openHiTLS/openHiTLS@2d3b221 commit
gitcode.com/openHiTLS/openhitls#1399 pull request
gitcode.com/openHiTLS/openhitls#1657 pull request

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2mo ago (2026-08-31)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.8	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CNA	3.1	6.8	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Classification

Weakness

CWE-295 Improper Certificate Validation

References

Sources

CVE List CVE-2026-57826
NVD CVE-2026-57826

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