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CVE-2026-33376

HIGHCVSS 7.4/10EPSS 0.27%

Last modified

CVE-2026-33376 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.4/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability
0.27%

18.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GrafanaGrafana>= 8.5.0, < 11.6.14
GrafanaGrafana>= 12.2.0, < 12.2.8
GrafanaGrafana>= 12.3.0, < 12.3.6
GrafanaGrafana>= 12.4.0, < 12.4.3
GrafanaGrafana11.6.14
GrafanaGrafana12.2.8
GrafanaGrafana12.3.6
GrafanaGrafana12.4.3
GrafanaGrafana13.0.0
GrafanaGrafana13.0.1

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-33376?
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.
How severe is CVE-2026-33376?
CVE-2026-33376 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.
How do I fix CVE-2026-33376?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33376?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST