Quick answers
- Is CVE-2026-33374 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-33374 being exploited in the wild.
- How severe is CVE-2026-33374?
- Medium severity, with a CVSS score of 6.5, published 13 October 2026.
- Which products and versions are affected?
- Grafana Labs Grafana versions before 12.4.13, 13.0.11, 13.1.8, and 13.2.4.
- Is there a fix for CVE-2026-33374?
- Yes: fixed in Grafana 12.4.13, 13.0.11, 13.1.8, 13.2.4 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-33374 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-33374?
- Check whether you run Grafana Labs Grafana at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: Grafana 12.4.13, 13.0.11, 13.1.8, 13.2.4 and later
Technical details
The Prometheus rule conversion API endpoints lack input validation on request body size, permitting authenticated users to trigger unbounded memory allocations. An authenticated attacker can send a crafted oversized request to exhaust server memory and cause an out-of-memory crash. The vulnerability is fixed in Grafana 12.4.13, 13.0.11, 13.1.8, and 13.2.4 or later.
Affected products
- Grafana Labs Grafana versions before 12.4.13, 13.0.11, 13.1.8, and 13.2.4
Timeline
- 2026-10-13: disclosed