CVE-2021-3127
CVSS v3
7.5
HIGH
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2021-03-16
Frequently asked questions
What is CVE-2021-3127?
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.
Is CVE-2021-3127 actively exploited?
Active exploitation of CVE-2021-3127 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-3127?
CVE-2021-3127 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-3127 affecting your environment?
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