NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control…
Priority LOW 36CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control because Import Token bindings are mishandled.
Why it matters now
EPSS 0.01448 73rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/nats-io/jwt/v2 (Go): 2.0.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | github.com/nats-io/jwt (Go) | up to 1.2.2 | — | No fix listed | GHSA-62mh-w5cv-p88c |
| — | github.com/nats-io/jwt/v2 (Go) | before 2.0.1 | 2.0.1 | Patch available | GHSA-62mh-w5cv-p88c |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- github.com/nats-io/jwt (Go) Vendor— Affected up to 1.2.2 Fixed in — No fix listed GHSA-62mh-w5cv-p88c
- github.com/nats-io/jwt/v2 (Go) Vendor— Affected before 2.0.1 Fixed in 2.0.1 Patch available GHSA-62mh-w5cv-p88c
Remediation
- Fix · GHSA-62mh-w5cv-p88c github.com/nats-io/jwt/v2 (Go) Fixed in 2.0.1 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3127
- 2026-10-03 Alias added: GHSA-62mh-w5cv-p88c
References
Other 5
Sources
- CVE-2021-3127 · CVE Program
- CVE-2021-3127 · NVD
- FIRST EPSS
- GHSA-62mh-w5cv-p88c · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3127 · Red Hat security data · CC BY 4.0
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