What’s Vulnerable › Vulnerabilities
CVE-2026-89313: JwksTrustStore.Get returns the last fetched JWKS key (err=nil) when the requested kid is absent, instead of nil
- Severity: medium (CVSS 6.3 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-23 · updated 2026-10-23
- Weakness: CWE-706
Description
`JwksTrustStore.Get` assigned each parsed key to the function's **named return value** while refreshing the JWKS cache. When the requested `kid` was not present, the trailing naked `return` handed the caller the last key in the JWKS document together with a `nil` error — a confidently wrong answer instead of "not found".
Affected products
- Eclipse Foundation Eclipse KeyPont - GOSE: from 0.7.5 through 0.13.0-rc1; before 1.0.0-rc4 — fixed in 1.0.0-rc4
How to fix
Upgrade to a fixed version: Eclipse Foundation Eclipse KeyPont - GOSE 1.0.0-rc4. Check the vendor advisory for mitigations.
References
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