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Medium ALSA-2026:54178 5 CVEs

Moderate: grafana security, bug fix, and enhancement update

Published Aug 12, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB.

Security Fix(es):

* grafana: Grafana: Privilege escalation via dashboard overwrite (CVE-2026-33377)
* grafana: Grafana Auth Proxy: Unauthorized access due to incorrect IPv6 allow-list default (CVE-2026-33376)
* grafana: Grafana: Denial of Service via unbounded memory growth in OAuth login route (CVE-2026-8609)
* grafana: Grafana: Denial of Service via excessive memory allocation from large API request payloads (CVE-2026-33382)

Bug Fix(es) and Enhancement(s):

* [grafana / rhel-10.2.z] Remove Lua ExclusiveArch macro for Konflux build (JIRA:AlmaLinux-188282)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 2

ReleasePackageFixed in
AlmaLinux · 10 grafana 10.2.6-28.el10_2.4
AlmaLinux · 10 grafana-selinux 10.2.6-28.el10_2.4

Vulnerabilities 5

  • High 7.5
    CVE-2026-33382

    Denial of service via unbounded request body size

    Several Grafana API endpoints, some of them unauthenticated, do not limit the size of the request body before processing it. An attacker can send very large payloads that force excessive memory allocation, potentially exhausting memory and causing a denial of…

    Grafana Grafana OSS grafana Web / CMS Alpine
  • High 7.5
    CVE-2026-42127

    Pre-authentication denial of service in the public dashboard query endpoint

    The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exh…

    Grafana Grafana OSS Grafana Enterprise grafana Web / CMS Ubuntu Alpine Wolfi Go
  • High 7.4
    CVE-2026-33376

    Auth Proxy IPv6 whitelist bypass

    When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML,…

    Grafana Grafana OSS grafana grafana-12.4 Web / CMS Ubuntu Wolfi
  • High 7.1
    CVE-2026-33377

    Dashboard Import Overwrites ACL — Editor Privilege Escalation to Dashboard Admin

    An Editor can overwrite a dashboard not owned by them to acquire admin on that specific dashboard. The user must have write access to the dashboard to escalate privilege.

    Grafana Grafana OSS grafana grafana-12.4 Web / CMS Ubuntu Wolfi
  • Medium 5.3
    CVE-2026-8609

    Pre-authentication denial of service via the OAuth login route

    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).

    Grafana Grafana OSS grafana Web / CMS Alpine

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-33376
  • report
    https://access.redhat.com/security/cve/CVE-2026-33377
  • report
    https://access.redhat.com/security/cve/CVE-2026-33382
  • report
    https://access.redhat.com/security/cve/CVE-2026-8609
  • report
    https://bugzilla.redhat.com/2477246
  • report
    https://bugzilla.redhat.com/2477262
  • report
    https://bugzilla.redhat.com/2499061
  • report
    https://bugzilla.redhat.com/2499062
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-54178.html
  • report
    https://www.redhat.com/security/data/cve/CVE-2026-42127.html