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...

6.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: Low

Exploit likelihood

0.26%Up 0.2 points since May 2, 2026

What each source reports

CVE List Score used 6.5

Record: CVE-2026-43504
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weakness: CWE-863
Updated: 2026-11-02

EUVDEUVD-2026-26657 6.5

Record: EUVD-2026-26657
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gjv9-jvc7-9mhf 6.5

An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5, when...

Record: GHSA-gjv9-jvc7-9mhf
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weakness: CWE-863
Updated: 2026-11-02

NVD 6.5

Record: CVE-2026-43504
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weakness: CWE-863
Updated: 2026-11-02

OSVALPINE-CVE-2026-43504 6.5

Record: ALPINE-CVE-2026-43504
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated: 2026-11-03

OSVDEBIAN-CVE-2026-43504 6.5

Record: DEBIAN-CVE-2026-43504
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-43504 6.5

Record: UBUNTU-CVE-2026-43504
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated: 2026-11-02

Affected products

prosody

Affected packages

Affected packages
Package	Affected	Fixed
`prosody` Alpine:v3.23	13.0.0 up to 13.0.5-r0	13.0.5-r0
`prosody` Alpine:v3.24	13.0.0 up to 13.0.5-r0	13.0.5-r0
`prosody` Debian:12	before 0.12.3-1+deb12u1, plus listed versions 0.12.3-1	0.12.3-1+deb12u1
`prosody` Debian:13	before 13.0.1-1+deb131u, plus listed versions 13.0.1-1	13.0.1-1+deb131u
`prosody` Debian:14	before 13.0.5-1, plus listed versions 13.0.1-113.0.2-113.0.3-113.0.4-113.0.4-213.0.4-2~bpo13+113.0.5-1~bpo13+1	13.0.5-1
`prosody` Ubuntu:16.04:LTS	All versions, plus listed versions 0.9.8-10.9.9-10.9.10-1	None known
`prosody` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 0.9.12-20.10.0-10.10.0-1build10.10.0-1ubuntu0.1~esm1	None known
`prosody` Ubuntu:20.04:LTS	All versions, plus listed versions 0.11.2-10.11.3-10.11.4-1	None known
`prosody` Ubuntu:22.04:LTS	All versions, plus listed versions 0.11.10-10.11.10-1build10.11.10-1build20.11.11-10.11.11-20.11.12-10.11.13-1	None known
`prosody` Ubuntu:24.04:LTS	All versions, plus listed versions 0.12.3-10.12.4-10.12.4-1build10.12.4-1build20.12.4-1build3	None known
`prosody` Ubuntu:25.10	All versions, plus listed versions 0.12.5-1build113.0.1-1	None known
`prosody` Ubuntu:26.10	All versions, plus listed versions 13.0.4-213.0.5-113.0.6-113.0.6-1build1	None known
`prosody` Ubuntu:26.04:LTS	All versions, plus listed versions 13.0.1-113.0.2-113.0.2-1build113.0.3-113.0.4-113.0.4-2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-43504 is a medium vulnerability (CVSS 6.5) in Prosody, published May 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. Fixed in prosody 13.0.5-r0.