CVE-2026-39833 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-16983122
- published28 May 2026
- disclosed22 May 2026
Introduced: 22 May 2026
NewCVE-2026-39833 (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.
The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.