CVE-2026-43504
Undergoing Analysis Undergoing Analysis - In Progress
Proxy65 Relay Misconfiguration in Prosody

Publication date: 2026-05-01

Last updated on: 2026-05-01

Assigner: MITRE

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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-01
Last Modified
2026-05-01
Generated
2026-06-16
AI Q&A
2026-05-01
EPSS Evaluated
2026-06-15
NVD
CVE-2026-43504
EUVD
EUVD-2026-26657
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
prosody prosody to 0.12.6 (exc)
prosody prosody From 13.0.0 (inc) to 13.0.5 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in Prosody versions before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5 when the mod_proxy65 module is enabled.

The issue arises because mod_proxy65 mishandles access control in a paused scenario, which allows relaying of unauthenticated traffic.

Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Detection Guidance

The provided resources do not include specific commands or detailed detection methods for identifying this vulnerability on your network or system.

Mitigation Strategies

To mitigate the vulnerability involving mod_proxy65 in Prosody, you should upgrade to the fixed versions 0.12.6 or 13.0.5.

If mod_proxy65 is not needed, disable it to prevent unauthorized proxy usage.

Review and adjust firewall limits to restrict connection rates and reduce the risk of exploitation.

Impact Analysis

The vulnerability can allow unauthenticated traffic to be relayed through the affected Prosody server.

This could lead to unauthorized use of the server for relaying traffic, potentially resulting in information leakage or abuse of the server's resources.

The CVSS score of 6.5 indicates a medium severity impact, with potential integrity and availability impacts.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-43504. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart