CVE-2026-57111: Apache Helix REST: Permissive CORS Configuration in REST API Allows Unrestricted Cross-Origin

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-09 · updated 2026-10-25
Weakness: CWE-1385

Description

Permissive Cross-Origin Resource Sharing (CORS) in the REST API (helix-rest, org.apache.helix.rest.server.filters.CORSFilter) in Apache Helix through 2.0.0 on all platforms allows a remote attacker controlling a web page visited by an authorized user to read responses from and issue cross-origin requests to administrative REST endpoints via a cross-origin request from an arbitrary origin, since the filter unconditionally returns Access-Control-Allow-Origin: * together with Access-Control-Allow-Credentials: true and reflects arbitrary Access-Control-Request-Method / Access-Control-Request-Headers values in preflight responses. Users are recommended to upgrade to version 2.0.1, which fixes this issue.

Affected products

Apache Software Foundation Apache Helix: before 2.0.1 — fixed in 2.0.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Helix 2.0.1. Check the vendor advisory for mitigations.

References

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