CVE-2026-73237: Apache Allura: XSS in markdown pipeline

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-12 · updated 2026-10-24
Weakness: CWE-80

Description

XSS vulnerability in Markdown handling in Apache Allura. This issue affects Apache Allura: from 1.10.0 before 1.19.1. Users are recommended to upgrade to version 1.19.1, which fixes the issue.

Affected products

Apache Software Foundation Apache Allura: from 1.10.0 before 1.19.1 — fixed in 1.19.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Allura 1.19.1. Check the vendor advisory for mitigations.

References

https://allura.apache.org/posts/2026-allura-1.19.1.html
https://lists.apache.org/thread/p7bd1yz9v9wbsbc6hz3tjxozxnwyzqz0
http://www.openwall.com/lists/oss-security/2026/08/12/16

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