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Vulnerability record · CVE-2020-26892 · published 6 November 2020

CVE-2020-26892: Linuxfoundation nats-server hard-coded credentials vulnerability

Linuxfoundation · Nats Server

The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.

9.8 CVSS 3.1 Critical EPSS 2.1% · top 19.3% CWE-798 · Hard-coded credentials
9.8CVSS 3.1 base score, v2 7.5
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nats-io/nats-server/commits/master PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT67XCLIIBYRT762SVFBYFF
https://www.openwall.com/lists/oss-security/2020/11/02/2 Mailing ListThird Party Advisory
https://github.com/nats-io/nats-server/commits/master PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT67XCLIIBYRT762SVFBYFF
https://www.openwall.com/lists/oss-security/2020/11/02/2 Mailing ListThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-26892), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.