Description
In Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) when a client publishes a retained message to a topic, then has its access to that topic revoked, the retained message will still be published to clients that subscribe to that topic in the future. In some applications this may result in clients being able cause effects that would otherwise not be allowed.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Mosquitto | 1.0 – < unspecified, unspecified – ≤ 1.5.5 | 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 | 1.5.6-1 | — |
| Debian 13 | mosquitto | 1.5.6-1 | — |
| Debian 12 | mosquitto | 1.5.6-1 | — |
| Debian 9 | mosquitto | 1.4.10-3+deb9u3 | DSA-4388-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mosquitto | 1.4.15-2ubuntu0.18.04.1 | — |
| Ubuntu 16.04 LTS | mosquitto | 1.4.8-1ubuntu0.16.04.5 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 | mosquitto | 1.4.15-bp150.3.3.1 | openSUSE-SU-2019:0237-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.23 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.22 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.21 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.20 | mosquitto | 1.5.6-r0 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.18 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.17 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.16 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.15 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.14 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.13 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.12 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.11 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.10 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.9 | mosquitto | 1.5.6-r0 | — |
| Alpine v3.8 | mosquitto | 1.4.15-r5 | — |
| Alpine v3.7 | mosquitto | 1.4.15-r1 | — |
Advisories 2
- DSA-4388-1 mosquitto - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:0237-1 Security update for mosquitto SUSE / openSUSE Security Updates · Feb 4, 2026