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...
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.
- Severity
- 6.5 MediumCVSS 3.1, CVE List
- Exploit chance
- 0.26%EPSS, 17th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
13.0.5-r0prosody +12 more
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.
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
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
prosodyAlpine:v3.23 | 13.0.0 up to 13.0.5-r0 | 13.0.5-r0 |
prosodyAlpine:v3.24 | 13.0.0 up to 13.0.5-r0 | 13.0.5-r0 |
prosodyDebian:12 | before 0.12.3-1+deb12u1, plus listed versions 0.12.3-1 | 0.12.3-1+deb12u1 |
prosodyDebian:13 | before 13.0.1-1+deb131u, plus listed versions 13.0.1-1 | 13.0.1-1+deb131u |
prosodyDebian: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 |
prosodyUbuntu:16.04:LTS | All versions, plus listed versions 0.9.8-10.9.9-10.9.10-1 | None known |
prosodyUbuntu: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 |
prosodyUbuntu:20.04:LTS | All versions, plus listed versions 0.11.2-10.11.3-10.11.4-1 | None known |
prosodyUbuntu: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 |
prosodyUbuntu: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 |
prosodyUbuntu:25.10 | All versions, plus listed versions 0.12.5-1build113.0.1-1 | None known |
prosodyUbuntu:26.10 | All versions, plus listed versions 13.0.4-213.0.5-113.0.6-113.0.6-1build1 | None known |
prosodyUbuntu: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 |
What each source reports
CVE List Score used
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.
- Record
CVE-2026-43504- CVSS 3.1
- 6.5 Medium
CVSS: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
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.
- Record
EUVD-2026-26657- CVSS 3.1
- 6.5 Medium
CVSS: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
An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5, when...
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.
- Record
GHSA-gjv9-jvc7-9mhf- CVSS 3.1
- 6.5 Medium
CVSS: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
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.
- Record
CVE-2026-43504- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L - Weakness
- CWE-863
- Updated
- 2026-11-12
OSVALPINE-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 a paused scenario, relaying of unauthenticated traffic can occur.
- Record
ALPINE-CVE-2026-43504- CVSS 3.1
- 6.5 Medium
CVSS: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
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.
- Record
DEBIAN-CVE-2026-43504- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L - Updated
- 2026-11-12
OSVUBUNTU-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 a paused scenario, relaying of unauthenticated traffic can occur.
- Record
UBUNTU-CVE-2026-43504- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L - Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | NVD | |
| affected, aliases, references | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
openwall.com/lists/oss-security/2026/05/01/5
prosody.im/security/advisory_735dd9d3
nvd.nist.gov/vuln/detail/CVE-2026-43504
github.com/advisories/GHSA-gjv9-jvc7-9mhf
security.alpinelinux.org/vuln/CVE-2026-43504
security-tracker.debian.org/tracker/CVE-2026-43504
ubuntu.com/security/CVE-2026-43504
cve.org/CVERecord?id=CVE-2026-43504
hg.prosody.im/trunk/rev/4bbb17445ed9