Grafana OSS: Incorrect Authorization (CVE-2026-17183)
Published Last modified Sources: SUSE, BSI, CVE.org, OSV
What is affected, what to do
An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data accessible through Grafana's configured datasource credentials to users who lack permission to query that datasource.
Update Grafana OSS to version 12.3.11, Grafana OSS to version 12.4.9, Grafana OSS to version 13.0.7.
- Affected
- Grafana OSS
lt 8.4.0..12.3.11 - Grafana OSS
lt 12.4.0..12.4.9 - Grafana OSS
lt 13.0.0..13.0.7 - Grafana OSS
lt 13.1.0..13.1.4 - Grafana Enterprise
lt 8.4.0..12.3.11 - Grafana Enterprise
lt 12.4.0..12.4.9 - Grafana Enterprise
lt 13.0.0..13.0.7 - Grafana Enterprise
lt 13.1.0..13.1.4
- Grafana OSS
- Fixed in
- Grafana OSS
12.3.11 - Grafana OSS
12.4.9 - Grafana OSS
13.0.7 - Grafana OSS
13.1.4 - Grafana Enterprise
12.3.11 - Grafana Enterprise
12.4.9 - Grafana Enterprise
13.0.7 - Grafana Enterprise
13.1.4
- Grafana OSS
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Metrics
7.1
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: Vendor (CNA), CVSS v3
7.1
CVSS v3
Severity High on the scale from 0 to 10.
Source: SUSE, BSI, CVE.org, OSV
0.3 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 20.8
Show all metrics
- Severity
- High
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 62.88 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 7.1 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 7.1
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 0.3 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 20.8
- Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-863
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data accessible through Grafana's configured datasource credentials to users who lack permission to query that datasource.
Source: suse_csaf, BSI WID Portal, BSI CSAF, NVD (NIST), cvelistv5, OSV (Open Source Vulnerabilities)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| Grafana | Grafana Enterprise |
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| Grafana | Grafana OSS |
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| Grafana | Grafana |
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Vendors and products
Weakness classes (CWE)
CWE-863Incorrect Authorization
Class
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Entry at MITRE CWE-863
References & sources
- grafana.comsecurity/security-advisories/cve-2026-17183Vendor advisory
- NVD (NIST)vuln/detail/CVE-2026-17183web
Changes to this CVE
Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).
Receivedgrafana.com
CVSS V3.1: AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness type: CWE-863
Description added or changed
Show 5 original changes
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) added —Grafana OSSDescription added —Summary An authenticated organization user who can create or edit alert rules in a folder can query a datasource for which they do not have datasources:query permission. The attacker sets the client-controlled query field queryType to __expr__ while retaining the UID of a real datasource. The alert-rule authorization path treats the query as a server-side expression and skips datasource permission enforcement, while the evaluator subsequently resolves and executes the query against the real datasource identified by datasourceUid. ## Impact This bypass can expose data accessible through Grafana's configured datasource credentials to a low-privileged user who is not authorized to query that datasource directly. Confidentiality impact is High. Integrity impact is Low because some datasource backends and configured credentials may permit state-changing queries. No availability impact has been demonstrated. ## Attack prerequisites - Authenticated, low-privileged user in the same Grafana organization - Permission to create or edit alert rules in an accessible folder - No datasources:query permission for the targeted datasource - Knowledge or discovery of the targeted datasource UID - No user interaction required ## Technical details / root cause 1. The attacker submits an alert-rule query with queryType: "__expr__" and the UID of a real datasource. 2. The datasource authorization helper skips permission enforcement when query.QueryType == "__expr__". 3. queryType is client-controlled and is not validated against the referenced datasource. 4. During evaluation, Grafana selects and loads the actual datasource using DatasourceUID, not the spoofed queryType. 5. The query therefore executes using Grafana's datasource credentials despite the caller lacking datasources:query. The root cause is inconsistent query classification between authorization and execution: authorization trusts queryType, while execution trusts DatasourceUID. ## Affected product / component - Product: Grafana OSS - Component: Unified Alerting / ngalert - Area: Alert-rule datasource authorization and query evaluation - Confirmed version: Grafana OSS 13.0.1 - Affected version range: not yet assessed ## Severity - CVSS 3.1: 7.1 High - Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N - CWE-863: Incorrect Authorization Scope is Unchanged because the vulnerable authorization decision and resulting impact remain within Grafana's security authority. ## Source - Researcher: czarflix - Intigriti report: GRAFANALABS-F996ATD7 - Report URL: https://app.intigriti.com/company/submissions/GRAFANALABS-F996ATD7 ## Related report / duplicate assessment This is a default-Grafana-OSS reproduction of the root cause previously reported in GRAFANALABS-IAQAFIXI. The earlier submission was archived as Not Applicable because its proof of concept depended on Cloud/Enterprise-specific permission mechanisms, and the researcher was invited to demonstrate the issue under default OSS permissions. This report establishes that missing prerequisite and should be treated as the actionable OSS submission, not dismissed as a duplicate. VUL-2026-0095 and VUL-2026-0126 concern Enterprise Recorded Queries and have different components, endpoints, and root causes; they are related authorization issues but not duplicates. ## Recommended remediation - Do not exempt a query from datasource authorization based solely on client-controlled queryType. - Resolve the referenced datasource server-side before authorization and apply datasources:query whenever the resolved UID represents a real datasource. - Require expression queries to reference only the canonical server-side expression datasource and reject mismatches such as queryType: "__expr__" paired with a real datasource UID. - Ensure authorization and evaluation use the same canonical datasource identity and fail closed when fields conflict. - Add regression coverage for an OSS user with folder-level alert-rule edit permission but without datasource query permission, including mismatched queryType and datasourceUid values.CVSS added —AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:NWeakness type (CWE) added —CWE-863Reference added —https://grafana.com/security/security-advisories/cve-2026-17183Source identifier: security@grafana.com
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<a href="https://intel.neosec.eu/en/cve/CVE-2026-17183"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-17183.svg?lang=en" alt="CVE-2026-17183 – NEOSEC Intel" height="20"></a>