How severe is CVE-2026-8609?

CVE-2026-8609 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-8609 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8609?

CVE-2026-8609 affects Grafana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8609?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-8609 published?

CVE-2026-8609 was published on 2026-07-10 and last updated on 2026-07-13.

CVE-2026-8609

CVE-2026-8609 is a medium-severity vulnerability in Grafana with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Grafana
Published: 2026-07-10
Last modified: 2026-07-13

Description

An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded memory growth that can eventually exhaust memory and crash the Grafana instance (denial of service).

Frequently asked questions

What is CVE-2026-8609?: An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded memory growth that can eventually exhaust memory and crash the Grafana instance (denial of service).
How severe is CVE-2026-8609?: CVE-2026-8609 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-8609 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8609?: CVE-2026-8609 affects Grafana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8609?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-8609 published?: CVE-2026-8609 was published on 2026-07-10 and last updated on 2026-07-13.

References

https://grafana.com/security/security-advisories/cve-2026-8609

Affected products (1)

cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

66.45.242.46 (ipv4-addr)