How severe is CVE-2026-78552?

CVE-2026-78552 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.

Is CVE-2026-78552 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-78552?

CVE-2026-78552 affects Okta Access Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-78552?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-78552 published?

CVE-2026-78552 was published on 2026-09-08 and last updated on 2026-09-23.

CVE-2026-78552

CVE-2026-78552 is a medium-severity vulnerability in Okta Access Gateway with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-693.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-693
Affected product: Okta Access Gateway
Published: 2026-09-08
Last modified: 2026-09-23

Description

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.

Frequently asked questions

What is CVE-2026-78552?: 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.
How severe is CVE-2026-78552?: CVE-2026-78552 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.
Is CVE-2026-78552 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-78552?: CVE-2026-78552 affects Okta Access Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-78552?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-78552 published?: CVE-2026-78552 was published on 2026-09-08 and last updated on 2026-09-23.

References

https://trust.okta.com/security-advisories/validation-bypass-in-okta-access-gateway-custom-directives-cve-2026-78552

Affected products (1)

cpe:2.3:a:okta:access_gateway:*:*:*:*:*:*:*:*

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