https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-16T10:32:39.433699+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-46212 EUVD-2026-46212 2026-10-16T10:32:39.437311+00:00 EUVD-2026-46212 https://cve.radiocsirt.org/vuln/fkie_cve-2020-26892 fkie_cve-2020-26892 2026-10-16T10:32:39.437341+00:00

The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.

 https://cve.radiocsirt.org/vuln/ghsa-4w5x-x539-ppf5 GHSA-4w5x-x539-ppf5 — Incorrect handling of credential expiry by /nats-io/nats-server 2026-10-16T10:32:39.437369+00:00

Affected: Go: github.com/nats-io/jwt

## Problem Description

NATS nats-server through 2020-10-07 has Incorrect Access Control because of how expired credentials are handled.

The NATS accounts system has expiration timestamps on credentials; the <https://github.com/nats-io/jwt> library had an API which encouraged misuse and an `IsRevoked()` method which misused its own API.

A new `IsClaimRevoked()` method has correct handling and the nats-server has been updated to use this. The old `IsRevoked()` method now always returns true and other client code will have to be updated to avoid calling it.

The CVE identifier should cover any application using the old JWT API, where the nats-server is one of those applications.

## Affected versions

#### JWT library

* all versions prior to 1.1.0 * fixed after nats-io/jwt PR 103 landed (2020-10-06)

#### NATS Server

* Version 2 prior to 2.1.9 + 2.0.0 through and including 2.1.8 are vulnerable. * fixed with nats-io/nats-server PRs 1632, 1635, 1645

## Impact

Time-based credential expiry did not work.

## Workaround

Have credentials which only expire after fixes can be deployed.

## Solution

Upgrade the JWT dependency in any application using it.

Upgrade the NATS server if using NATS Accounts.

 https://cve.radiocsirt.org/vuln/gsd-2020-26892 gsd-2020-26892 2026-10-16T10:32:39.437411+00:00 gsd-2020-26892 https://cve.radiocsirt.org/vuln/ubuntu-cve-2020-26892 UBUNTU-CVE-2020-26892 2026-10-16T10:32:39.437425+00:00

Affected: Ubuntu:20.04:LTS: golang-github-nats-io-jwt, Ubuntu:22.04:LTS: golang-github-nats-io-jwt

The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.