VDB
CVE-2020-26521
CVE-2020-26521
PUBLISHED
CVSS 7.5 HIGH
Nil dereference in NATS JWT, DoS of nats-server
Record from NVD · Published November 6, 2020
github.com/nats-io/jwt is fixed in 1.1.0 (Go Modules)
The JWT library in NATS nats-server before 2.1.9 allows a denial of service (a nil dereference in Go code).
EPSS 2.16% · 82.1th percentile
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| github.com/nats-io/jwt | Go Modules | 1.1.0 |
Risk scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
2.16%
82.1th percentile
Affected products
| Vendor | Product | Versions |
|---|---|---|
| fedoraproject | fedora | 33 |
| linuxfoundation | nats-server | 0 |
Timeline
- Nov 6, 2020 CVE Published
- Apr 14, 2021 EPSS Score (30 in total, the first dated here)
- Feb 11, 2022 CVE Updated
- Mar 17, 2026 Security Advisory
- Sep 1, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2020-26521
vulnetix vdb fixes CVE-2020-26521Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2020-26521/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart