CVE-2026-33376

Auth Proxy IPv6 whitelist bypass

High · published May 13, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
19.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00282 · 19.6th percentile
Published
2026-05-13T19:28Z
EPSS history
Timeline
  • 13 MAY 19:28Z
    Auth Proxy IPv6 whitelist bypass
    cvelistv5