CVE-2026-33376
Auth Proxy IPv6 whitelist bypass
Severity Score
7.4
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track*
*SSVC
Descriptions
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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track*
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-03-19 CVE Reserved
- 2026-05-13 CVE Published
- 2026-05-14 CVE Updated
- 2026-05-14 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-1188: Initialization of a Resource with an Insecure Default
CAPEC
References (1)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://grafana.com/security/security-advisories/cve-2026-33376 | 2026-05-14 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Grafana Search vendor "Grafana" | Grafana OSS Search vendor "Grafana" for product "Grafana OSS" | >= 9.4.0 <= 11.6.14 Search vendor "Grafana" for product "Grafana OSS" and version " >= 9.4.0 <= 11.6.14" | en |
Affected
| ||||||
| Grafana Search vendor "Grafana" | Grafana OSS Search vendor "Grafana" for product "Grafana OSS" | >= 12.0.0 <= 12.2.8 Search vendor "Grafana" for product "Grafana OSS" and version " >= 12.0.0 <= 12.2.8" | en |
Affected
| ||||||
| Grafana Search vendor "Grafana" | Grafana OSS Search vendor "Grafana" for product "Grafana OSS" | >= 12.3.0 <= 12.3.6 Search vendor "Grafana" for product "Grafana OSS" and version " >= 12.3.0 <= 12.3.6" | en |
Affected
| ||||||
| Grafana Search vendor "Grafana" | Grafana OSS Search vendor "Grafana" for product "Grafana OSS" | >= 12.4.0 <= 12.4.3 Search vendor "Grafana" for product "Grafana OSS" and version " >= 12.4.0 <= 12.4.3" | en |
Affected
| ||||||
| Grafana Search vendor "Grafana" | Grafana OSS Search vendor "Grafana" for product "Grafana OSS" | >= 13.0.0 <= 13.0.1 Search vendor "Grafana" for product "Grafana OSS" and version " >= 13.0.0 <= 13.0.1" | en |
Affected
| ||||||