CVE-2026-63087Public exploitNetwork attack vector

Unauthenticated administrative takeover via token-minting endpoint

Published Jul 16, 2026 · Updated Jul 16, 2026

Missing authentication in Grafana OnCall OSS 1.16.11 and earlier allows remote attackers to take over an organization through the install API. InstallV2View clears its authentication and permission classes, accepts public default organization identifiers, and returns a newly provisioned PluginAuthToken. Any remote attacker who can reach the self-hosted engine port can gain administrative API access, alter organization data, create Admin users, and revoke the legitimate plugin token.

CVSS severity9.3
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Grafana OnCall OSS 1.16.11 and earlier allows remote attackers to take over an organization through the install API. InstallV2View clears its authentication and permission classes, accepts public default organization identifiers, and returns a newly provisioned PluginAuthToken. Any remote attacker who can reach the self-hosted engine port can gain administrative API access, alter organization data, create Admin users, and revoke the legitimate plugin token.

The record

CVE
CVE-2026-63087
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Grafana Labs
Product
Grafana OnCall OSS
Classifications
CWE-306, CAPEC-216, CAPEC-166, CAPEC-12, CAPEC-36, CAPEC-62, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.16.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grafana Labs · Grafana OnCall OSSversion=0 <=1.16.11

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-216Communication Channel Manipulation
CAPEC-166Force the System to Reset Values
CAPEC-12Choosing Message Identifier
CAPEC-36Using Unpublished Interfaces or Functionality
CAPEC-62Cross Site Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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