CVE-2026-43507

Name: CVE-2026-43507
Creator: NVD / NIST
Published: 2026-05-01T15:16:52.99+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2026-43507 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.35%

26.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Prosody	Prosody	< 0.12.6
Prosody	Prosody	>= 13.0.0, < 13.0.5

References

https://blog.unionium.org/ARTICLES/1.HTMThird Party Advisory
https://prosody.im/security/advisory_735dd9d3/Mitigation, Patch, Vendor Advisory
https://www.openwall.com/lists/oss-security/2026/05/01/5Mailing List, Patch, Third Party Advisory

Timeline

Published: May 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-43507?

How severe is CVE-2026-43507?

CVE-2026-43507 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2026-43507?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-43507?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST