# CVE-2026-102589: Cross-instance user impersonation through image renderer JWTs

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

When independent Grafana instances share the same [rendering] renderer_token, an image renderer key issued by one instance is accepted by the others, so a user on one instance could act as the user with the same ID on another (origin validation error). This affects instances with the renderAuthJWT feature toggle enabled, the default from Grafana 13.0.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Grafana / Grafana OSS: ≥ 9.5.0; ≤ 12.3.11 (affected, semver); ≥ 12.4.0; ≤ 12.4.14 (affected, semver); ≥ 13.0.0; ≤ 13.0.12 (affected, semver); ≥ 13.1.0; ≤ 13.1.9 (affected, semver); ≥ 13.2.0; ≤ 13.2.5 (affected, semver); ≥ 13.3.0; ≤ 13.3.0 (affected, semver). Source: CNA: GRAFANA
- Grafana / Grafana Enterprise: ≥ 9.5.0; ≤ 12.3.11 (affected, semver); ≥ 12.4.0; ≤ 12.4.14 (affected, semver); ≥ 13.0.0; ≤ 13.0.12 (affected, semver); ≥ 13.1.0; ≤ 13.1.9 (affected, semver); ≥ 13.2.0; ≤ 13.2.5 (affected, semver); ≥ 13.3.0; ≤ 13.3.0 (affected, semver). Source: CNA: GRAFANA

## Severity and prioritization

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L; source: CNA: GRAFANA

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L; source: NVD: security@grafana.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-346, CWE-863, CWE-200

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://grafana.com/security/security-advisories/cve-2026-102589 (CNA: GRAFANA; vendor-advisory)

- https://grafana.com/security/security-advisories/cve-2026-102589 (security@grafana.com)

## Provenance

- CNA: GRAFANA: https://www.cve.org/CVERecord?id=CVE-2026-102589; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-102589; retrieved 2026-11-11; source updated 2026-11-11

Revision: 7980bb5a37611ee1eb442cb33c1f73313e6d088ebbab4080835c9c6106a049cc

Canonical: https://y2.dev/cve/CVE-2026-102589

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