CVE-2026-43506 — Prosody Denial of Service
CVE-2026-43506 — 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.
What This Means For You
- If your environment is affected by CWE-401, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-43506 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-43506 - Prosody Unauthenticated Memory Exhaustion DoS
title: CVE-2026-43506 - Prosody Unauthenticated Memory Exhaustion DoS
id: scw-2026-05-01-ai-1
status: experimental
level: high
description: |
Detects potential exploitation of CVE-2026-43506 by identifying unauthenticated POST requests to Prosody's XMPP server endpoints, which could lead to memory exhaustion and denial of service due to memory leaks.
author: SCW Feed Engine (AI-generated)
date: 2026-05-01
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-43506/
tags:
- attack.impact
- attack.t1499
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/xmpp-server/'
cs-method:
- 'POST'
sc-status:
- '200'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-43506 | vulnerability | CVE-2026-43506 |
| CWE-401 | weakness | CWE-401 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 01, 2026 at 18:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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