What is CVE-2026-43505?

CVE-2026-43505 is a medium-severity vulnerability in Prosody, classified under Unprotected Alternate Channel. CVSS score: 6.5/10. Published 2026-05-01.

How severe is CVE-2026-43505?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Prosody

CVE-2026-43505

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.

EPSS: 0.001 (20.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Prosody — versions 0, 1.0.0

Weakness classification (CWE)

CWE-420 — Unprotected Alternate Channel

References

cve@mitre.org (Patch, Mailing List, Third Party Advisory)
cve@mitre.org (Patch, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-43505?: CVE-2026-43505 is a medium-severity vulnerability in Prosody, classified under Unprotected Alternate Channel. CVSS score: 6.5/10. Published 2026-05-01.
How severe is CVE-2026-43505?: Medium severity. CVSS v3 base score is 6.5 out of 10.