by Kastro
Paper/Archive/CVE-2026-63087

CVE-2026-63087

grafana-cold-storage oncall — Grafana OnCall 1.16.11 Unauthenticated Token Hijack via Plugin Install Endpoint

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 53.6.536 × 2010.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Grafana OnCall through 1.16.11 contains an unauthenticated access vulnerability that allows remote attackers to obtain a valid PluginAuthToken by sending a POST request to the internal plugin install endpoint using hardcoded default stack_id and org_id values present in the public source tree. Attackers can leverage the acquired token to authenticate against all internal API endpoints, create arbitrary Admin users via the user-context header bootstrap path, revoke the legitimate plugin token, and redirect OnCall-to-Grafana API calls to an attacker-controlled host by overwriting the organization's grafana_url and api_token.

Affected

ProductAffectedFixed inSource
oncall≤ 1.16.11–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

exploitgithub.com/geo-chen/oss/blob/main/oncall.mdwriteupvulncheck.com/advisories/grafana-oncall-unauthenticated-token-hijack-via-plugin-install-endpoint