---
id: CVE-2026-89313
title: >-
  JwksTrustStore.Get returns the last fetched JWKS key (err=nil) when the
  requested kid is absent, instead of nil
summary: >-
  `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 docu…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-706
vendor: Eclipse Foundation
product: github.com/ThalesGroup/gose
affected:
  - github.com/ThalesGroup/gose >= 0.7.5 <= 0.13.0-rc1
  - github.com/eclipse-keypont/gose < 1.0.0-rc4
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T08:40:55.499Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89313'
references:
  - url: >-
      https://github.com/eclipse-keypont/gose/security/advisories/GHSA-v7r8-g6h9-99vv
tags:
  - cve.org
ingestedAt: '2026-10-23T09:20:44.060Z'
---

## Overview

`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

- `github.com/ThalesGroup/gose >= 0.7.5 <= 0.13.0-rc1`
- `github.com/eclipse-keypont/gose < 1.0.0-rc4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.