CVE-2024-7318: Keycloak-core: one time passcode (otp) is valid longer than expiration timeseverity

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-09 · updated 2026-06-17
Weakness: CWE-324

Description

A vulnerability was found in Keycloak. Expired OTP codes are still usable when using FreeOTP when the OTP token period is set to 30 seconds (default). Instead of expiring and deemed unusable around 30 seconds in, the tokens are valid for an additional 30 seconds totaling 1 minute. A one time passcode that is valid longer than its expiration time increases the attack window for malicious actors to abuse the system and compromise accounts. Additionally, it increases the attack surface because at any given time, two OTPs are valid.

Affected products

Red Hat build of Keycloak 26.4: from 22.0 before 24.0.7 — fixed in 24.0.7

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 24.0.7. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-7318 or the next vulnerability affects your stack