Vulnerability · Published May 1, 2026 · Assigned by mitre
CVE-2026-43506
Medium 5.3
In plain English
A medium-severity memory leak 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 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 79.6% 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. A Denial of Service can occur via memory exhaustion caused by memory leaks from unauthenticated connections.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.21 | prosody | 0.12.6-r0 | ALPINE-CVE-2026-43506 |
| Alpine:v3.22 | prosody | 0.12.6-r0 | ALPINE-CVE-2026-43506 |
| Alpine:v3.23 | prosody | 13.0.5-r0 | ALPINE-CVE-2026-43506 |
| Alpine:v3.24 | prosody | 13.0.5-r0 | ALPINE-CVE-2026-43506 |
| Debian:12 | prosody | 0.12.3-1+deb12u1 | DEBIAN-CVE-2026-43506 |
| Debian:13 | prosody | 13.0.1-1+deb131u | DEBIAN-CVE-2026-43506 |
| Debian:14 | prosody | 13.0.5-1 | DEBIAN-CVE-2026-43506 |
| Ubuntu:22.04:LTS | prosody | no fix listed | UBUNTU-CVE-2026-43506 |
| Ubuntu:24.04:LTS | prosody | no fix listed | UBUNTU-CVE-2026-43506 |
| Ubuntu:25.10 | prosody | no fix listed | UBUNTU-CVE-2026-43506 |
| Ubuntu:26.04:LTS | prosody | no fix listed | UBUNTU-CVE-2026-43506 |
| Ubuntu:26.10 | prosody | no fix listed | UBUNTU-CVE-2026-43506 |
Affected products (as reported)
Weakness: CWE-401 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L