Improper Certificate Validation Affecting spire-server package, versions <1.15.0-r2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-SPIRESERVER-16969564
- published28 May 2026
- disclosed22 May 2026
Introduced: 22 May 2026
NewCVE-2026-39835 (opens in a new tab)How to fix?
Upgrade Chainguard spire-server to version 1.15.0-r2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream spire-server package and not the spire-server package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.