EUVD-2026-74168
GHSA-5hj5-f578-54jw
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L
Admin-level access required to reach the vulnerable config field (PR:H); network-accessible admin interface (AV:N); directive injection yields high integrity impact with limited confidentiality and availability effects.
Primary rating from Vendor (okta).
CVSS VectorVendor: okta
Lifecycle Timeline
2DescriptionCVE.org
The Okta Access Gateway does not apply its Lua directive restriction to the application-level custom configuration field. The field is interpolated directly into the nginx server block without inspection, resulting in execution of injected directives.
AnalysisAI
Nginx directive injection in Okta Access Gateway before version 2026.9.1 enables an authenticated administrator to inject arbitrary nginx directives into the gateway's server block by exploiting the application-level custom configuration field, which bypasses the Lua-based restriction mechanism applied to other directive entry points. The field is interpolated directly into the nginx server block without validation, allowing manipulation of routing, access controls, and header processing with high integrity impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires high-privilege authenticated access (PR:H) to the Okta Access Gateway administrative interface - specifically the ability to edit the application-level custom configuration field for at least one configured application. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L vector and resulting score of 6.0 are well-calibrated: the High privilege prerequisite (PR:H) is the dominant risk-limiting factor, constraining realistic exploitation to compromised administrative accounts, insider threats, or credential-reuse attacks targeting OAG administrators. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Okta Access Gateway to version 2026.9.1 or later, which resolves the directive restriction bypass per the Okta PSIRT advisory at https://trust.okta.com/security-advisories/validation-bypass-in-okta-access-gateway-custom-directives-cve-2026-78552. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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