Grafana is widely deployed; this unauthenticated flaw allows full admin takeover and API hijacking of OnCall instances, which can disrupt monitoring/incident response broadly.
CVE-2026-63087
Unauthenticated token leak in Grafana OnCall <=1.16.11 enabling admin takeover
Is CVE-2026-63087 being exploited?
Not confirmed. CVE-2026-63087 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.71% probability of exploitation in the next 30 days.
How severe is CVE-2026-63087?
CVE-2026-63087 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-63087?
Not known from our data. No patch reference has been recorded for CVE-2026-63087, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-63087 affect?
CVE-2026-63087 affects Grafana OnCall <= 1.16.11, OnCall internal plugin install endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-63087?
Block plugin install endpoint, restrict network access to OnCall, rotate tokens; apply vendor patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated retrieval of PluginAuthToken; create admin users, revoke tokens, overwrite grafana_url/api_token and redirect API calls — full app takeover.
Immediate action required
- affected<= 1.16.11
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.