CVE-2026-21727 | Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record

--- title: Cross-Tenant Legacy Correlation Disclosure and Deletion draft: false hero: image: /static/img/heros/hero-legal2.svg content: "# Cross-Tenant Legacy Correlation Disclosure and Deletion" date: 2026-01-29 product: Grafana severity: Low cve: CVE-2026-21727 cvss_score: "3.3" cvss_vector: "CVSS:3.3/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N" fixed_versions: - ">=11.6.11 >=12.0.9 >=12.1.6 >=12.2.4" --- A cross-tenant isolation vulnerability was found in Grafana’s Correlations feature affecting legacy correlation records. Due to a backward compatibility condition allowing org_id = 0 records to be returned across organizations, a user with datasource management privileges could read and permanently delete legacy correlation data belonging to another organization. This issue affects correlations created prior to Grafana 10.2 and is fixed in >=11.6.11, >=12.0.9, >=12.1.6, and >=12.2.4. Thanks to Gyu-hyeok Lee (g2h) for reporting this vulnerability.

Published: 2026-04-15 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-21727 is rated Low Risk (17/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.20%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-21727

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.20% +0.20%
2 2026-04-16 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-21727

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.3 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 0.7 2.5 [email protected]

Weakness enumeration for CVE-2026-21727

GitHub Security Advisory for CVE-2026-21727

GHSA-p5x9-j974-rpfp · Severity: low — --- title: Cross-Tenant Legacy Correlation Disclosure and Deletion draft: false hero: image: ...

OS Trackers for CVE-2026-21727

vendor priority summary link
alpine — CVE-2026-21727: 1 source package rows (grafana); 43 state rows across 2 repos (3.23-community, edge-community); fixed 0, open 43. https://security.alpinelinux.org/vuln/CVE-2026-21727
redhat low — https://access.redhat.com/security/cve/CVE-2026-21727
suse low CVE-2026-21727 severity low: SUSE including 1 source package names (grafana), 3 product×package rows across 3 product lines (SUSE Linux Enterprise Module for Package Hub 15 SP7, SUSE Manager Client Tools for SLE 15, openSUSE Leap 15.6): Known Not Affected 3. https://www.suse.com/security/cve/CVE-2026-21727/
ubuntu medium CVE-2026-21727 medium priority: Ubuntu including 1 source packages (grafana), 6 status rows across 6 suites (jammy, noble, questing, resolute, upstream, xenial): DNE 4, needs-triage 2. https://ubuntu.com/security/CVE-2026-21727

Affected software / configurations for CVE-2026-21727

Vendor Product Version Raw CPE
grafana grafana < 11.6.11 cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
grafana grafana >= 12.0.0, < 12.0.9 cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
grafana grafana >= 12.1.0, < 12.1.6 cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
grafana grafana >= 12.2.0, < 12.2.4 cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
grafana grafana >= 12.3.0, < 12.3.3 cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*

References for CVE-2026-21727

cvelogic Threat Intelligence