CVE catalog

CVE-2020-28466

nats-server affected and fixed versions

This affects all versions of package github.com/nats-io/nats-server/server. Untrusted accounts are able to crash the server using configs that represent a service export/import cycles. Disclaimer from the maintainers: Running a NATS service which is exposed to untrusted users presents a heightened risk. Any remote execution flaw or equivalent seriousness, or denial-of-service by unauthenticated users, will lead to prompt releases by the NATS maintainers. Fixes for denial of service issues with no threat of remote execution, when limited to account holders, are likely to just be committed to the main development branch with no special attention. Those who are running such services are encouraged to build regularly from git.

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jan 1, 2020, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.73% · Oct 27, 2026

Projects and upstream resources

[nats-server][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debiantrixie	nats-server	`2.10.27-1`	Not affected	[CVE-2020-28466]
Debiansid	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debiansid	nats-server	`2.15.1-1`	Not affected	[CVE-2020-28466]
Debianforky	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debianforky	nats-server	`2.15.1-1`	Not affected	[CVE-2020-28466]
Debianbookworm	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debianbookworm	nats-server	`2.9.10-1`	Not affected	[CVE-2020-28466]

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debianbookworm	nats-server	`2.9.10-1`	Not affected	[CVE-2020-28466]
Debianforky	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debianforky	nats-server	`2.15.1-1`	Not affected	[CVE-2020-28466]
Debiansid	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debiansid	nats-server	`2.15.1-1`	Not affected	[CVE-2020-28466]
Debiantrixie	nats-server	Not reported	Not affectedDistribution reports not affected	[CVE-2020-28466]
Debiantrixie	nats-server	`2.10.27-1`	Not affected	[CVE-2020-28466]

Original provider fields

{
  "package_releases": [
    {
      "name": "nats-server",
      "status": "not affected",
      "release": "sid",
      "version": "2.15.1-1"
    },
    {
      "name": "nats-server",
      "status": "not affected",
      "release": "forky",
      "version": "2.15.1-1"
    },
    {
      "name": "nats-server",
      "status": "not affected",
      "release": "trixie",
      "version": "2.10.27-1"
    },
    {
      "name": "nats-server",
      "status": "not affected",
      "release": "bookworm",
      "version": "2.9.10-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "nats-server",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "nats-server",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "nats-server",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "nats-server",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": []
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[golang-github-nats-io-nats-server-dev]Unknown
Source package: [nats-server]
Details (2)
- 2.9.10-1 · all · bookworm
  Not affected
  dsa · nats-server · debian · bookworm
- 2.9.10-1 · all · bookworm
  Not affected
  dsa · nats-server · debian · bookworm
[nats-server]Unknown
Source package: [nats-server]
Details (2)
- 2.9.10-1+b3 · amd64 · bookworm
  Not affected
  dsa · nats-server · debian · bookworm
- 2.9.10-1+b3 · arm64 · bookworm
  Not affected
  dsa · nats-server · debian · bookworm

Observed: Oct 23, 2026, 5:51:07 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [Red Hat security advisories and VEX]