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Fencer Vulns
medium 5.3

CVE-2026-8609 json

Pre-authentication denial of service via the OAuth login route

published 2026-07-10 4 mo ago modified 2026-10-25 14 d ago also BIT-grafana-2026-8609 , EUVD-2026-42921

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

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).

Patch / fix

  • bitnami grafana 11.6.15, 12.2.9, 12.3.7, 12.4.4, 13.0.2
  • grafana grafana 11.6.15, 12.2.9, 12.3.7, 12.4.4, 13.0.2
  • grafana12.4 hummingbird 1 12.4.10-0.1.hum1
  • grafana13.1 hummingbird 1 13.1.3-0.5.hum1
  • grafana13.2 hummingbird 1 13.2.1-0.1.hum1
  • grafana RHEL 10.2 10.2.6-28.el10_2.4
  • grafana-selinux RHEL 10.2 10.2.6-28.el10_2.4
  • grafana enterprise linux eus 10.0 10.2.6-26.el10_0
  • grafana-selinux enterprise linux eus 10.0 10.2.6-26.el10_0

red hat advisories RHSA-2026:67517RHSA-2026:65157RHSA-2026:63165RHSA-2026:63164RHSA-2026:54178

  • system-user-grafana SLE Module for Package Hub 15 SP7 1.0.0-150200.5.8.1
  • grafana SLE Module for Package Hub 15 SP7 12.4.10-150200.3.94.3
  • grafana Multi Linux Manager Tools SLE-15 12.4.10-150002.4.27.1
  • mgr-push Multi Linux Manager Tools SLE-15 5.2.5-150002.3.12.1
  • spacecmd Multi Linux Manager Tools SLE-15 5.2.10-150002.3.15.1
  • uyuni-tools Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 5.2.17-150002.3.20.1
  • venv-salt-minion Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 3006.0-150002.5.22.1
  • spacewalk-client-tools Multi Linux Manager Tools SLE-15 5.2.7-150002.3.12.1

suse advisories SUSE-SU-2026:4600-1SUSE-SU-2026:4585-1

  • grafana openSUSE Leap 16.0 12.4.10-bp160.1.1
  • grafana openSUSE Tumbleweed 12.4.5-4.1

opensuse advisories openSUSE-SU-2026:22125-1openSUSE-SU-2026:11619-1

  • grafana AlmaLinux 10 10.2.6-28.el10_2.4
  • grafana-selinux AlmaLinux 10 10.2.6-28.el10_2.4

almalinux advisories ALSA-2026:54178

  • grafana Rocky Linux 10 10.2.6-28.el10_2.4

rocky linux advisories RLSA-2026:54178

  • grafana Alpine 3.24 12.4.4-r0

alpine advisories ALPINE-CVE-2026-8609

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-8609 updated cvss 5.3

grafana: Grafana: Denial of Service via unbounded memory growth in OAuth login route

  • Red Hat Ceph Storage 9 rhceph/grafana-rhel10
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 9) grafana 10.2.6-23.el9_8.4, grafana-selinux 10.2.6-23.el9_8.4
    fixed: vendor fix RHSA-2026:90811
  • Red Hat Enterprise Linux AppStream (v. 10) grafana 10.2.6-28.el10_2.4, grafana-selinux 10.2.6-28.el10_2.4
    fixed: vendor fix RHSA-2026:54178
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) grafana 10.2.6-26.el10_0, grafana-selinux 10.2.6-26.el10_0
    fixed: vendor fix RHSA-2026:67517
  • Red Hat Hardened Images grafana13.1 13.1.3-0.5.hum1, grafana13.2 13.2.1-0.1.hum1, grafana12.4 12.4.10-0.1.hum1
    fixed: vendor fix RHSA-2026:65157
  • Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-grafana-rhel9 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel9 Red Hat Ceph Storage 5 rhceph/rhceph-5-dashboard-rhel8 Red Hat Ceph Storage 6 rhceph/rhceph-6-dashboard-rhel9 Red Hat Ceph Storage 7 rhceph/grafana-rhel9 Red Hat Ceph Storage 8 rhceph/grafana-rhel9
    +1 more products
    Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    not affected: vulnerable code not present
  • Red Hat Hardened Images hi/grafana
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami grafana
>=11.6.0, <11.6.15
>=12.2.0, <12.2.9
>=12.3.0, <12.3.7
>=12.4.0, <12.4.4
>=13.0.0, <13.0.2
11.6.15
12.2.9
12.3.7
12.4.4
13.0.2

Affected products

  • Grafana Grafana OSS

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.