CVE-2026-10592
Certificates with wildcard DNS SANs (e.g. *.example.com) bypassed CA name-constraint checks. A certificate with a wildcard DNS SAN that should be rejected by the issuing CA's permitted/excluded DNS name constraints could be accepted.
CSIRTS triage
- What
- The vulnerability allows wildcard DNS SAN to bypass CA name-constraint checks.
- Who is affected
- Deployments using affected certificate authorities.
- Urgency
- Remediation is medium urgency due to the medium severity rating.
- Action
- Review and update certificate authority configurations.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (2)
- mediumCVE-2026-10592: Certificates with wildcard DNS SANs (e.g. *.example.com) bypassed CA name-constraint checks. A…nvd · 2026-06-25
- mediumCVE-2026-10592: Wildcard DNS SAN bypasses CA name-constraint checksmsrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-10592)