CVE-2026-79656
Received
Received - Intake
OAuth Token Exposure in Grafana Logs
Vulnerability report for CVE-2026-79656, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-28
Last updated on: 2026-10-28
Assigner: Grafana Labs
Description
Description
A user with read access to Grafana's server logs, or to a log store they are shipped to, can recover the OAuth and OIDC access, refresh and ID tokens of users who sign in through the Generic OAuth, Google or GitLab providers. Grafana writes these tokens to its logs unredacted when an access or ID token is not a valid JWT, when the ID token is missing (at debug level) or is not a string (exposure of sensitive information in log files). The exposure is bounded by the scopes granted to the configured OAuth client.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Grafana | Grafana OSS | 0 |
| Grafana | Grafana OSS | 12.4.0 |
| Grafana | Grafana OSS | 13.0.0 |
| Grafana | Grafana OSS | 13.1.0 |
| Grafana | Grafana OSS | 13.2.0 |
| Grafana | Grafana Enterprise | 0 |
| Grafana | Grafana Enterprise | 12.4.0 |
| Grafana | Grafana Enterprise | 13.0.0 |
| Grafana | Grafana Enterprise | 13.1.0 |
| Grafana | Grafana Enterprise | 13.2.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-532 | The product writes sensitive information to a log file. |
