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CVE-2025-59390

9.8 · CRITICAL

Apache Druid’s Kerberos authenticator uses a weak fallback secret when the `druid.auth.authenticator.kerberos.cookieSignatureSecret` configuration is not explicitly set.

Published Nov 26, 2025CWE-338EPSS 0.61%

Overview

CVE-2025-59390 is a critical-severity vulnerability. It was published on November 26, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.ker

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.apache.org/thread/jwjltllnntgj1sb9wzsjmvwm9f8rlhg8Refwww.openwall.com/lists/oss-security/2025/11/26/1

How CyberStrike helps

Frequently asked questions

What is CVE-2025-59390?

CVE-2025-59390 is a critical-severity vulnerability. It was published on November 26, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-59390?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-59390?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-59390?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-59390 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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