CVE-2026-88858 Server-side expression parser denial of service
Medium 6.5
Published
Updated
Check this codebase for CVE-2026-88858 and fix it if it is affected.
What it is: CVE-2026-88858 is a medium-severity vulnerability in Grafana Enterprise, published on 28 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-88858 in the wild and no public exploit code.
Affected product: Grafana Enterprise. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-88858/ (Markdown: https://insights.sbomify.com/CVE-2026-88858/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-88858?
CVE-2026-88858 is a medium-severity vulnerability in Grafana Enterprise, published on 28 Oct 2026.
Official description
A user with the Viewer role in Grafana can crash the server by submitting a crafted server-side math expression (uncontrolled recursion). A user with permission to provision alert rules can make the outage persist across restarts.
Which versions are affected by CVE-2026-88858?
How do I fix CVE-2026-88858?
No fix has been published for CVE-2026-88858 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-88858 being exploited?
There is no known exploitation of CVE-2026-88858 in the wild and no public exploit code.
Sources
Also known as GHSA-8c7v-vg28-7vr8, UBUNTU-CVE-2026-88858.