Vulnerability · Published May 1, 2026 · Assigned by mitre
CVE-2026-43505
Medium 6.5
In plain English
A medium-severity security flaw in Prosody from Prosody. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 89.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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 the activation scenario, relaying of unauthenticated traffic can occur.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | prosody | 13.0.5-r0 | ALPINE-CVE-2026-43505 |
| Alpine:v3.24 | prosody | 13.0.5-r0 | ALPINE-CVE-2026-43505 |
| Debian:12 | prosody | 0.12.3-1+deb12u1 | DEBIAN-CVE-2026-43505 |
| Debian:13 | prosody | 13.0.1-1+deb131u | DEBIAN-CVE-2026-43505 |
| Debian:14 | prosody | 13.0.5-1 | DEBIAN-CVE-2026-43505 |
| Ubuntu:22.04:LTS | prosody | no fix listed | UBUNTU-CVE-2026-43505 |
| Ubuntu:24.04:LTS | prosody | no fix listed | UBUNTU-CVE-2026-43505 |
| Ubuntu:25.10 | prosody | no fix listed | UBUNTU-CVE-2026-43505 |
| Ubuntu:26.04:LTS | prosody | no fix listed | UBUNTU-CVE-2026-43505 |
| Ubuntu:26.10 | prosody | no fix listed | UBUNTU-CVE-2026-43505 |
Affected products (as reported)
Weakness: CWE-420 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L