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CVE-2026-21721 is an improper object-level authorization vulnerability in Grafana's dashboard permissions API. The API verifies the dashboards.permissions:* action but does not validate that the target dashboard is within the caller's authorized scope. Consequently, a user authorized to manage permissions for one dashboard can read and modify permission settings for other dashboards in the same organization.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
Repository contains a single Python exploit script plus a short README. The README (Russian) claims an exploit for CVE-2026-21721 tested on Grafana version 12.1.1, requiring a valid Editor account. The script (exploit_CVE-2026-21721.py) is an authenticated, network-based exploit that logs into a Grafana instance assumed to be hosted under the /grafana subpath, retrieves the current user’s numeric id via /api/user, enumerates all dashboards via /api/search?type=dash-db&query=, and for each dashboard UID reads existing permissions from /api/dashboards/uid/{uid}/permissions and then POSTs an updated permissions list setting the attacker’s userId to permission=4 (Admin). After attempting escalation across all dashboards, it performs basic post-exploitation checks by requesting /api/datasources (printing datasource names and URLs) and /api/admin/settings (to see if admin-only access is now possible). TLS certificate verification is disabled (session.verify=False) and warnings are suppressed, making it suitable for lab/self-signed targets. No external C2, hardcoded IPs/domains, or destructive actions are present; the primary capability is bulk dashboard-level privilege escalation via Grafana’s HTTP API.
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11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Grafana dashboard-permissions scope-bypass vulnerability that enables cross-dashboard privilege escalation.
A Grafana dashboard-permissions scope-bypass vulnerability that enables cross-dashboard privilege escalation.
An Important-severity vulnerability tracked as CVE-2026-21721. The supplied metadata indicates network-reachable exploitation with low attack complexity and low privileges required, potentially resulting in high confidentiality and integrity impact. Exploits and a patch are available.
Listed in the advisory CVE section without descriptive context in the provided content.
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