Description
In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic security plugin, if the ability for a client to make subscriptions on a topic is revoked when a durable client is offline, then existing subscriptions for that client are not revoked.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Mosquitto | 2.0 – < unspecified, unspecified – ≤ 2.0.11 | unspecified |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mosquitto | 2.0.15-1 | — |
| Debian 13 | mosquitto | 2.0.15-1 | — |
| Debian 12 | mosquitto | 2.0.11-1.2+deb12u1 | DSA-5511-1 |
| Debian 11 | mosquitto | 2.0.11-1+deb11u1 | DSA-5511-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mosquitto | 2.0.11-1ubuntu1.1 | USN-6492-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | mosquitto | 1.6.9-1ubuntu0.1~esm1 | USN-6492-1 |
Advisories 2
- USN-6492-1 mosquitto vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5511-1 mosquitto - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=575324
- FEDORA-2021-aee8f32946 vendor-advisory
- FEDORA-2021-dc6df3744a vendor-advisory
- DSA-5511 vendor-advisory