Description
prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | prosody | 0.10.2, 0.9.14 | — |
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 | prosody | 0.10.2-1 | — |
| Debian 13 | prosody | 0.10.2-1 | — |
| Debian 12 | prosody | 0.10.2-1 | — |
| Debian 9 | prosody | 0.9.12-2+deb9u2 | DSA-4216-1 |
| Debian 8 | prosody | 0.9.7-2+deb8u4 | DSA-4216-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | prosody | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | prosody | 0.10.0-1ubuntu0.1~esm1 | USN-4834-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.7 | prosody | 0.10.2-r0 | — |
Advisories 2
- USN-4834-1 prosody vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4216-1 prosody - security update Debian Security (DSA / DLA) · Mar 9, 2026