Vulnerability · Published May 13, 2026 · Assigned by GRAFANA
CVE-2026-33376Auth Proxy IPv6 whitelist bypass
High 7.4
In plain English
A high-severity security flaw in Grafana OSS from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.3%top 79.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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, LDAP, etc are unaffected here.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | grafana | 10.2.6-28.el10_2.4 | ALSA-2026:54178 |
| AlmaLinux:9 | grafana | 10.2.6-23.el9_8.2 | ALSA-2026:58982 |
| AlmaLinux:10 | grafana-selinux | 10.2.6-28.el10_2.4 | ALSA-2026:54178 |
| AlmaLinux:9 | grafana-selinux | 10.2.6-23.el9_8.2 | ALSA-2026:58982 |
| Rocky Linux:10 | grafana | 0:10.2.6-28.el10_2.4 | RLSA-2026:54178 |
| Rocky Linux:9 | grafana | 0:10.2.6-23.el9_8.2 | RLSA-2026:58982 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Grafana OSS | 9.4.0 – through 11.6.1411.6.14 – before 11.6.14+security-0412.0.0 – through 12.2.812.2.8 – before 12.2.8+security-0412.3.0 – through 12.3.612.3.6 – before 12.3.6+security-0412.4.0 – through 12.4.312.4.3 – before 12.4.3+security-02 |
Weakness: CWE-1188 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://grafana.com/security/security-advisories/cve-2026-33376 vendor-advisory