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An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5. (CVE-2026-43506)

0
Medium
VulnerabilityCVE-2026-43506gcveosvubuntu-cve-2026-43506cve-2026-43506ubuntu-16-04-ltsubuntu-pro-18-04-ltsubuntu-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-25-10ubuntu-26-10ubuntu-26-04-lts
Published: 05/01/2026 (05/01/2026, 15:16:00 UTC)
Source: GCVE Database
Product: prosody

Description

A denial of service vulnerability exists in Prosody versions before 0.12.6 and from 1.0.0 through 13.0.0 before 13.0.5. The issue is caused by memory exhaustion due to memory leaks triggered by unauthenticated connections.

CVSS v3.1

Score 7.5high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=xenial
Affected versions
=0.9.8-1=0.9.9-1=0.9.10-1
Ubuntu:Pro:18.04:LTSmore threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=esm-apps/bionic
Affected versions
=0.9.12-2=0.10.0-1=0.10.0-1build1=0.10.0-1ubuntu0.1~esm1
Ubuntu:20.04:LTSmore threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=focal
Affected versions
=0.11.2-1=0.11.3-1=0.11.4-1
Ubuntu:22.04:LTSmore threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=jammy
Affected versions
=0.11.10-1=0.11.10-1build1=0.11.10-1build2=0.11.11-1=0.11.11-2=0.11.12-1=0.11.13-1
Ubuntu:24.04:LTSmore threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=noble
Affected versions
=0.12.3-1=0.12.4-1=0.12.4-1build1=0.12.4-1build2=0.12.4-1build3
Ubuntu:25.10more threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=questing
Affected versions
=0.12.5-1build1=13.0.1-1
Ubuntu:26.10more threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=stonking
Affected versions
=13.0.4-2=13.0.5-1=13.0.6-1=13.0.6-1build1
Ubuntu:26.04:LTSmore threats →ghsa
prosody
pkg:deb/ubuntu/prosody?arch=source&distro=resolute
Affected versions
=13.0.1-1=13.0.2-1=13.0.2-1build1=13.0.3-1=13.0.4-1=13.0.4-2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/18/2026, 01:37:41 UTC

Technical Analysis

CVE-2026-43506 affects Prosody versions prior to 0.12.6 and versions 1.0.0 through 13.0.0 before 13.0.5. The vulnerability allows unauthenticated attackers to cause a denial of service by exhausting memory resources via memory leaks. This flaw impacts the availability of the affected Prosody server instances.

Potential Impact

The vulnerability results in a denial of service condition by exhausting server memory, which can disrupt service availability. There is no impact on confidentiality or integrity reported.

Mitigation Recommendations

A fix is available in Prosody version 0.12.6 and in versions 13.0.5 and later. Users should upgrade to these versions to remediate the vulnerability.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-43506
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1

Threat ID: 6ad3f6802cdf04f6566671d1

Added to database: 10/17/2026, 22:28:16 UTC

Last enriched: 10/18/2026, 01:37:41 UTC

Last updated: 10/18/2026, 01:37:41 UTC

Views: 5

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