CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2020-26521
High (7.5). EPSS 2.2% chance of exploitation in the next 30 days. Fixed in github.com/nats-io/jwt 1.1.0.
The JWT library in NATS nats-server before 2.1.9 allows a denial of service (a nil dereference in Go code).
Severity
- EPSS
- 2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)
- CWE
- CWE-476
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fedoraproject:fedora
- linuxfoundation:nats-server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-h2fg-54x9-5qhq | Go | github.com/nats-io/jwt | <1.1.0 | 1.1.0 |
| GHSA-hmm9-r2m2-qg9w | Go | github.com/nats-io/nats-server/v2 | <2.1.9 | 2.1.9 |
| GO-2022-0402 | Go | github.com/nats-io/jwt | <1.1.0 | 1.1.0 |
References
- http://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/
- http://www.openwall.com/lists/oss-security/2020/11/02/2
- https://github.com/nats-io/nats-server/commits/master