Description
It was discovered that an internal Prosody library to load XML based on libexpat does not properly restrict the XML features allowed in parsed XML data. Given suitable attacker input, this results in expansion of recursive entity references from DTDs (CWE-776). In addition, depending on the libexpat version used, it may also allow injections using XML External Entity References (CWE-611).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | prosody | Fixed in prosody 0.11.12, Affects all versions with support for WebSockets. | — |
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 | 0.11.12-1 | — |
| Debian 13 | prosody | 0.11.12-1 | — |
| Debian 12 | prosody | 0.11.12-1 | — |
| Debian 11 | prosody | 0.11.9-2+deb11u1 | DSA-5047-1 |
| Debian 10 | prosody | 0.11.2-1+deb10u3 | DSA-5047-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | prosody | No fix yet | — |
| Ubuntu 26.04 LTS | prosody | No fix yet | — |
| Ubuntu 25.10 | prosody | No fix yet | — |
| Ubuntu 24.04 LTS | prosody | No fix yet | — |
| Ubuntu 22.04 LTS | prosody | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | prosody | No fix yet | — |
| Ubuntu 16.04 LTS | prosody | No fix yet | — |
| Ubuntu Pro 18.04 LTS | prosody | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP3 | prosody | 0.11.12-bp153.2.12.1 | openSUSE-SU-2022:0012-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | prosody | 0.11.12-1.1 | openSUSE-SU-2024:11736-1 |
| openSUSE Leap 15.3 | prosody | 0.11.12-bp153.2.12.1 | openSUSE-SU-2022:0012-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | prosody | 0.11.12-r0 | — |
| Alpine v3.23 | prosody | 0.11.12-r0 | — |
| Alpine v3.22 | prosody | 0.11.12-r0 | — |
| Alpine v3.21 | prosody | 0.11.12-r0 | — |
| Alpine v3.20 | prosody | 0.11.12-r0 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | prosody | 0.11.12-r0 | — |
| Alpine v3.18 | prosody | 0.11.12-r0 | — |
| Alpine v3.17 | prosody | 0.11.12-r0 | — |
| Alpine v3.16 | prosody | 0.11.12-r0 | — |
| Alpine v3.15 | prosody | 0.11.12-r0 | — |
Advisories 3
- DSA-5047-1 prosody - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11736-1 prosody-0.11.12-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0012-1 Security update for prosody SUSE / openSUSE Security Updates · Feb 4, 2026