CVE-2026-33376 (GCVE-0-2026-33376)

Vulnerability from cvelistv5 – Published: 2026-05-13 19:28 – Updated: 2026-05-16 03:56
VLAI?
Title
Auth Proxy IPv6 whitelist bypass
Summary
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.
Severity ?
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-1188 - Initialization of a Resource with an Insecure Default
Assigner
References
Impacted products
Vendor Product Version
Grafana Grafana OSS Affected: 9.4.0 , ≤ 11.6.14 (semver)
Affected: 11.6.14 , < 11.6.14+security-04 (custom)
Affected: 12.0.0 , ≤ 12.2.8 (semver)
Affected: 12.2.8 , < 12.2.8+security-04 (custom)
Affected: 12.3.0 , ≤ 12.3.6 (semver)
Affected: 12.3.6 , < 12.3.6+security-04 (custom)
Affected: 12.4.0 , ≤ 12.4.3 (semver)
Affected: 12.4.3 , < 12.4.3+security-02 (custom)
Affected: 13.0.0 , ≤ 13.0.1 (semver)
Affected: 13.0.1 , < 13.0.1+security-01 (custom)
Create a notification for this product.
Date Public ?
2026-05-13 07:44
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.