Medium severity · published Sep 8, 2026
CVE-2026-78629
Improper Authentication Verification in the Okta Hyperdrive Agent MFA Response Handling
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
The Okta Hyperdrive agent plugin returns a success response without a signed SAML assertion when the organization's policy requires no MFA for a given user. The response contains only a bare boolean validation indicator with no cryptographic artifact, resulting in an unverifiable authentication verdict being delivered to the relying application.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OH
Okta Hyperdrive Agent · Okta
1.2.0 before 1.5.2 · source: vendor
HY
Hyperdrive · Okta
1.2.0 before 1.5.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78629
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78629
Vendor Advisory
https://trust.okta.com/security-advisories/improper-authentication-verification-in-the-okta-hyperdrive-agent-mfa-response-handling-cve-2026-78629
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