Prosody XMPP server advisory 2026-04-29

2026-04-30 · CVE-2026-43504, CVE-2026-43505, CVE-2026-43506, CVE-2026-43507 · VuXML entry

The Prosody team reports: Traffic patterns were discovered which can cause Prosody to consume excessive amounts of memory with much smaller amounts of incoming traffic. This traffic can be sent by unauthenticated connections. It was discovered that mod_proxy65’s access control was broken and incomplete due to two bugs. The issue with unpausing connections was discovered and disclosed by Max Hearnden .

Affected versions

• prosody < 13.0.5

By system

1 still vulnerable, 1 fixed. Where VuXML applies (FreeBSD, DragonFly, FreeBSD's derivatives) a port is vulnerable while its version is in a range; pkgsrc says itself whether it lists a CVE of this advisory; OpenBSD and MidnightBSD keep no list this site reads, so their row is only an estimate: FreeBSD's ranges applied to upstream's version.