GHSA-w88f-4875-99c8: Apache Druid’s Kerberos authenticator uses a weak fallback secret

1. GitHub Advisory Database
2. GitHub Reviewed
3. CVE-2025-59390

Apache Druid’s Kerberos authenticator uses a weak fallback secret

Critical severity GitHub Reviewed Published Nov 26, 2025 to the GitHub Advisory Database • Updated Nov 26, 2025

Package

maven org.apache.druid:druid (Maven)

Affected versions

< 35.0.0

Apache Druid’s Kerberos authenticator uses a weak fallback secret when the druid.auth.authenticator.kerberos.cookieSignatureSecret configuration is not explicitly set. In this case, the secret is generated using ThreadLocalRandom, which is not a crypto-graphically secure random number generator. This may allow an attacker to predict or brute force the secret used to sign authentication cookies, potentially enabling token forgery or authentication bypass. Additionally, each process generates its own fallback secret, resulting in inconsistent secrets across nodes. This causes authentication failures in distributed or multi-broker deployments, effectively leading to a incorrectly configured clusters. Users are advised to configure a strong druid.auth.authenticator.kerberos.cookieSignatureSecret

This issue affects Apache Druid: through 34.0.0.

Users are recommended to upgrade to version 35.0.0, which fixes the issue making it mandatory to set druid.auth.authenticator.kerberos.cookieSignatureSecret when using the Kerberos authenticator. Services will fail to come up if the secret is not set.

References

• https://nvd.nist.gov/vuln/detail/CVE-2025-59390
• https://lists.apache.org/thread/jwjltllnntgj1sb9wzsjmvwm9f8rlhg8
• http://www.openwall.com/lists/oss-security/2025/11/26/1
• apache/druid#18368

Published to the GitHub Advisory Database

Nov 26, 2025

Last updated

Nov 26, 2025