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.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2947986ad6 advisory.

    # Prosody 13.0.5

    Upstream is pleased to announce a new minor release from their stable branch.

    This is a security release for the Prosody 13.0.x stable series. It fixes multiple security issues, some     memory leaks and some smaller bugs and changes which have been implemented since the previous release.

    Full details about the security vulnerabilities can be found in upstream's [security     advisory](https://prosody.im/security/advisory_735dd9d3/). Upstream encourages all Prosody operators on     13.0.4 or earlier to upgrade to 13.0.5 as soon as possible, or to review the advisory and implement     appropriate mitigations.

    A summary of changes in this release:

    ## Security
     - mod_proxy65: Consistently apply authorization checks
     - mod_proxy65: Dont proxy data until after bytestream activation
     - mod_c2s, mod_s2s: Introduce new pre-authentication stanza size limit
     - Add limit for stanza max child elements
     - mod_c2s: Remove timers immediately on disconnection
     - net.server_epoll: Clean up timers after disconnection

    ## Fixes and improvements
     - net.http.parser: Fix handling of chunked request
     - MUC: Advertise hats feature on room JID
     - moduleapi: Use multitable add/remove instead of set (fixes memory leak)
     - mod_cloud_notify: Fix leaking iq response handlers by using `send_iq()`
     - Improve federation with servers using only IP addresses
     - prosody: Prevent loading local code when installed system-wide
     - mod_http_file_share: Improve handling of Range requests
     - mod_carbons: Fix some carbons decision-making bugs

    ## Minor changes
     - net.resolvers: Fix to avoid SRV lookups for IP addresses
     - prosody: Abort earlier on incompatible Lua version
     - mod_turn_external: hand out credentials for type `==` turns too
     - mod_s2s: Fully validate stream addressing
     - prosodyctl check features: Warn if http file sharing enabled on both host and component
     - util.prosodyctl: Dont check for mod_posix being disabled, its deprecated
     - util.startup: Improve error message when failing to load config file
     - util.x509: Add support for iPAddress certs
     - prosodyctl: Trim any trailing newline from password entry
     - mod_admin_shell: Make cert index search path relative to config file
     - mod_admin_shell: Improve multi-host command handling
     - mod_admin_shell: Show help listing when specifying only a section name
     - mod_admin_shell: Ensure password validity when setting passwords for new/existing users
     - mod_account_activity: Handle authentication provider returning no user info
     - config: Use default value when enum option has incorrect value
     - mod_http: Handle streaming requests to avoid invoking redirect handler


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-36c53b9ca8 advisory.

    # Prosody 13.0.5

    Upstream is pleased to announce a new minor release from their stable branch.

    This is a security release for the Prosody 13.0.x stable series. It fixes multiple security issues, some     memory leaks and some smaller bugs and changes which have been implemented since the previous release.

    Full details about the security vulnerabilities can be found in upstream's [security     advisory](https://prosody.im/security/advisory_735dd9d3/). Upstream encourages all Prosody operators on     13.0.4 or earlier to upgrade to 13.0.5 as soon as possible, or to review the advisory and implement     appropriate mitigations.

    A summary of changes in this release:

    ## Security
     - mod_proxy65: Consistently apply authorization checks
     - mod_proxy65: Dont proxy data until after bytestream activation
     - mod_c2s, mod_s2s: Introduce new pre-authentication stanza size limit
     - Add limit for stanza max child elements
     - mod_c2s: Remove timers immediately on disconnection
     - net.server_epoll: Clean up timers after disconnection

    ## Fixes and improvements
     - net.http.parser: Fix handling of chunked request
     - MUC: Advertise hats feature on room JID
     - moduleapi: Use multitable add/remove instead of set (fixes memory leak)
     - mod_cloud_notify: Fix leaking iq response handlers by using `send_iq()`
     - Improve federation with servers using only IP addresses
     - prosody: Prevent loading local code when installed system-wide
     - mod_http_file_share: Improve handling of Range requests
     - mod_carbons: Fix some carbons decision-making bugs

    ## Minor changes
     - net.resolvers: Fix to avoid SRV lookups for IP addresses
     - prosody: Abort earlier on incompatible Lua version
     - mod_turn_external: hand out credentials for type `==` turns too
     - mod_s2s: Fully validate stream addressing
     - prosodyctl check features: Warn if http file sharing enabled on both host and component
     - util.prosodyctl: Dont check for mod_posix being disabled, its deprecated
     - util.startup: Improve error message when failing to load config file
     - util.x509: Add support for iPAddress certs
     - prosodyctl: Trim any trailing newline from password entry
     - mod_admin_shell: Make cert index search path relative to config file
     - mod_admin_shell: Improve multi-host command handling
     - mod_admin_shell: Show help listing when specifying only a section name
     - mod_admin_shell: Ensure password validity when setting passwords for new/existing users
     - mod_account_activity: Handle authentication provider returning no user info
     - config: Use default value when enum option has incorrect value
     - mod_http: Handle streaming requests to avoid invoking redirect handler


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1efa008794 advisory.

    # Prosody 13.0.5

    Upstream is pleased to announce a new minor release from their stable branch.

    This is a security release for the Prosody 13.0.x stable series. It fixes multiple security issues, some     memory leaks and some smaller bugs and changes which have been implemented since the previous release.

    Full details about the security vulnerabilities can be found in upstream's [security     advisory](https://prosody.im/security/advisory_735dd9d3/). Upstream encourages all Prosody operators on     13.0.4 or earlier to upgrade to 13.0.5 as soon as possible, or to review the advisory and implement     appropriate mitigations.

    A summary of changes in this release:

    ## Security
     - mod_proxy65: Consistently apply authorization checks
     - mod_proxy65: Dont proxy data until after bytestream activation
     - mod_c2s, mod_s2s: Introduce new pre-authentication stanza size limit
     - Add limit for stanza max child elements
     - mod_c2s: Remove timers immediately on disconnection
     - net.server_epoll: Clean up timers after disconnection

    ## Fixes and improvements
     - net.http.parser: Fix handling of chunked request
     - MUC: Advertise hats feature on room JID
     - moduleapi: Use multitable add/remove instead of set (fixes memory leak)
     - mod_cloud_notify: Fix leaking iq response handlers by using `send_iq()`
     - Improve federation with servers using only IP addresses
     - prosody: Prevent loading local code when installed system-wide
     - mod_http_file_share: Improve handling of Range requests
     - mod_carbons: Fix some carbons decision-making bugs

    ## Minor changes
     - net.resolvers: Fix to avoid SRV lookups for IP addresses
     - prosody: Abort earlier on incompatible Lua version
     - mod_turn_external: hand out credentials for type `==` turns too
     - mod_s2s: Fully validate stream addressing
     - prosodyctl check features: Warn if http file sharing enabled on both host and component
     - util.prosodyctl: Dont check for mod_posix being disabled, its deprecated
     - util.startup: Improve error message when failing to load config file
     - util.x509: Add support for iPAddress certs
     - prosodyctl: Trim any trailing newline from password entry
     - mod_admin_shell: Make cert index search path relative to config file
     - mod_admin_shell: Improve multi-host command handling
     - mod_admin_shell: Show help listing when specifying only a section name
     - mod_admin_shell: Ensure password validity when setting passwords for new/existing users
     - mod_account_activity: Handle authentication provider returning no user info
     - config: Use default value when enum option has incorrect value
     - mod_http: Handle streaming requests to avoid invoking redirect handler


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6252 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6252-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     May 07, 2026                          https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : prosody     CVE ID         : CVE-2026-43504 CVE-2026-43505 CVE-2026-43506                      CVE-2026-43507

    Multiple security issues were found in Prosody, a lightweight     Jabber/XMPP server, which could result in denial of service or     insufficient access control when using the SOCKS5 proxy module.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 0.12.3-1+deb12u1.

    For the stable distribution (trixie), these problems have been fixed in     version 13.0.1-1+deb131u.

    We recommend that you upgrade your prosody packages.

    For the detailed security status of prosody please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/prosody

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - 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. (CVE-2026-43504)

  - 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. (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. A Denial of
    Service can occur via memory exhaustion caused by memory leaks from unauthenticated connections.
    (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 XML parsing resource amplification from unauthenticated
    connections. (CVE-2026-43507)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2026-43506)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
313721	Fedora 44 : prosody (2026-2947986ad6)	Nessus	Fedora Local Security Checks	high
313719	Fedora 43 : prosody (2026-36c53b9ca8)	Nessus	Fedora Local Security Checks	high
313718	Fedora 42 : prosody (2026-1efa008794)	Nessus	Fedora Local Security Checks	high
313163	Debian dsa-6252 : prosody - security update	Nessus	Debian Local Security Checks	high
441052	Alpine: multiple prosody packages: security update to 13.0.5-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
441052	Alpine: multiple prosody packages: security update to 13.0.5-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
311714	Linux Distros Unpatched Vulnerability : CVE-2026-43506	Nessus	Misc.	high

Detections

Analytics

CVE-2026-43506

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Tenable Plugins

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high

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