CVE-2023-47090

NATS nats-server before 2.9.23 and 2.10.x before 2.10.2 has an authentication bypass. An implicit $G user in an authorization block can sometimes be used for unauthenticated access, even when the intention of the configuration was for each user to have an account. The earliest affected version is 2.2.0.

• CWE-863

• http://www.openwall.com/lists/oss-security/2023/10/30/1Mailing List
• https://github.com/nats-io/nats-server/security/advisories/GHSA-fr2g-9hjm-wr23Vendor Advisory
• https://www.openwall.com/lists/oss-security/2023/10/13/2Mailing List, Mitigation
• http://www.openwall.com/lists/oss-security/2023/10/30/1Mailing List
• https://github.com/nats-io/nats-server/security/advisories/GHSA-fr2g-9hjm-wr23Vendor Advisory
• https://www.openwall.com/lists/oss-security/2023/10/13/2Mailing List, Mitigation

Published

Oct 30, 2023

Last Modified

Jun 17, 2026

Status

Modified

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