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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (27.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Prosody — versions 0, 1.0.0
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2026/05/01/5 (Patch, Mailing List, Third Party Advisory)
- prosody.im/security/advisory_735dd9d3/ (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.