CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2020-26892
Critical (9.8). EPSS 2.3% chance of exploitation in the next 30 days. Fixed in github.com/nats-io/nats-server/v2 2.1.9.
The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.
Severity
- EPSS
- 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
- CWE
- CWE-798
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fedoraproject:fedora
- linuxfoundation:nats-server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2c64-vj8g-vwrq | Go | github.com/nats-io/nats-server/v2 | <2.1.9 | 2.1.9 |
| GHSA-4w5x-x539-ppf5 | Go | github.com/nats-io/jwt | <1.1.0 | 1.1.0 |
| GO-2022-0380 | Go | github.com/nats-io/jwt | <1.1.0 | 1.1.0 |
References
- https://github.com/nats-io/nats-server/commits/master
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT67XCLIIBYRT762SVFBYFFTQFVSM3SI/
- https://www.openwall.com/lists/oss-security/2020/11/02/2
- https://github.com/nats-io/nats-server/commits/master
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT67XCLIIBYRT762SVFBYFFTQFVSM3SI/