CVE-2026-43504 Missing authorization in Prosody
Attackers can relay unauthenticated traffic via Prosody's mod_proxy65 module when enabled, bypassing access controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43504?
CVE-2026-43504 is a medium-severity missing authorization vulnerability in Prosody, published on 1 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5, when mod_proxy65 is enabled. Because mod_proxy65 mishandles access control in a paused scenario, relaying of unauthenticated traffic can occur.
Weakness: CWE-863
Which versions are affected by CVE-2026-43504?
It affects 1 product.
Products include Prosody Prosody.
How do I fix CVE-2026-43504?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-43504 being exploited?
There is no known exploitation of CVE-2026-43504 in the wild and no public exploit code.
Other vulnerabilities in Prosody
Sources
Also known as DEBIAN-CVE-2026-43504, GHSA-gjv9-jvc7-9mhf, UBUNTU-CVE-2026-43504.