Vulnerability · Published Sep 8, 2026 · Assigned by Okta

CVE-2026-78560Improper Authentication Validation in Okta Access Gateway Pass-Through Authentication Source

Medium 4.8

In plain English

A medium-severity improper authentication in Okta Access Gateway from Okta. 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).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.3%top 78.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Okta Access Gateway includes an optional pass-through authentication source that accepts user identity from a client-supplied HTTP header without cryptographic validation. In architectures where this optional source is enabled without an upstream reverse proxy or firewall configured to sanitize and enforce client headers, an unauthenticated user can supply an arbitrary identity value to initiate a session.

Affected products (as reported)

Vendor	Product	Versions
Okta	Okta Access Gateway	0 – before 2026.9.1

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

https://trust.okta.com/security-advisories/improper-authentication-validation-in-okta-access-gateway-pass-through-authentication-source-cve-2026-78560