PatchTheCVECVE-2026-42129: A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative
CVE-2026-42129 is a high-severity flaw (CVSS 7.7) affecting loki datasource. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.
Why this priority
- High severity
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.7 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 62%) |
| CISA exploited list | No |
| Weakness | CWE-22 |
| Published | 2026-06-22 |
| Last modified | 2026-10-25 |
Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-42129?
loki datasource: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-42129 being exploited?
CVE-2026-42129 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-42129 affect?
CVE-2026-42129 affects loki datasource. Severity is high (CVSS 7.7). A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.
How urgent is CVE-2026-42129?
Priority 37/100. High severity