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CVE-2025-59390

35
FAUCET Score

CVE-2025-59390 is a critical vulnerability in Apache Druid versions through 34.0.0, where the Kerberos authenticator uses a cryptographically weak fallback secret for cookie signing if not explicitly configured, potentially allowing authentication bypass or token forgery. With a CVSS score of 9.8 (CRITICAL), this flaw is easily exploitable over the network with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, and users are advised to upgrade to version 35.0.0, which mandates a strong secret configuration.

Impacted Technologies

VendorProductVersion(s)CPE
< 35.0.0CPE matchmatch criteria
cpe:2.3:a:apache:druid:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.65%
Probability of exploitation in next 30 days
EPSS Percentile
47.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0065 is in the 29th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.apache.druid:druidFixed in: 35.0.0

Vendor Advisories (1)

mavenGHSA-w88f-4875-99c8critical

Apache Druid’s Kerberos authenticator uses a weak fallback secret

Nov 26, 2025

References

openwall.com / lists/oss-security/2025/11/26/1
Mailing ListThird Party Advisory
lists.apache.org / thread/jwjltllnntgj1sb9wzsjmvwm9f8rlhg8
Vendor Advisory