(This advisory is canonically <https://advisories.nats.io/CVE/CVE-2021-3127.txt)
Full advisory text at GitHub advisory or NVD.
go package report
Is github.com/nats-io/jwt/v2 safe?
github.com/nats-io/jwt/v2 (go) has 1 known vulnerability, the worst rated CRITICAL. Upgrade to 2.0.1 or later to clear it. No malicious-package signal is recorded.
// reach
0 direct dependencies
none carry a known advisory
45 packages depend on it
an advisory here reaches each of them
Create a free accountfor every dependency path, dependent and what to upgrade
// ai model usage
Tracked for PyPI packages. HuggingFace models declare Python dependencies, so go packages are not covered.
cvss
9.0
critical
severity band, no base score published
epss
1.4%
medium
chance of exploitation in 30 days, 74th percentile of all CVEs
xyz score
4.3
medium
CyberXYZ composite out of 10
fig. 01 — GHSA-62mh-w5cv-p88c, the advisory selected below
// 1 advisories
Is github.com/nats-io/jwt/v2 safe to install?
CyberXYZ does not call a package safe in absolute terms. It records 1 known vulnerability for github.com/nats-io/jwt/v2 (go), the worst rated CRITICAL, and no malicious-package signal. Whether it is acceptable depends on the version you run.
Does github.com/nats-io/jwt/v2 have known vulnerabilities?
Yes. CyberXYZ records 1 known vulnerability for github.com/nats-io/jwt/v2 (go), the worst rated CRITICAL. They are GHSA-62mh-w5cv-p88c.
Which version of github.com/nats-io/jwt/v2 should I use?
2.0.1 or later clears every advisory recorded for github.com/nats-io/jwt/v2 (go). Check the release you pick before installing it.
How do I check github.com/nats-io/jwt/v2 before installing?
Search github.com/nats-io/jwt/v2 in CyberXYZ Check at https://cyberxyz.io/check?q=github.com%2Fnats-io%2Fjwt%2Fv2. The xyz Scanner checks a project's dependencies, and CyberXYZ Proxy checks each package as it is installed.
Checked 2026-11-14 at 05:20 UTC. The most recent advisory here was published 2022-02-15. Updated continuously from NVD, GHSA, OSV and CNA feeds.