PatchTheCVECVE-2026-73237: XSS vulnerability in Markdown handling in Apache Allura. This issue affects Apache Allura: from 1.10.0 before
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MEDIUM 6.1WATCHLISTUPGRADE
CVE-2026-73237 is a medium-severity flaw (CVSS 6.1) affecting allura. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.8% (top 44%) |
| CISA exploited list | No |
| Weakness | CWE-80 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Publisher (CNA): Apache Software Foundation · Vendor: apache
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
apache allura UPGRADE
Affected: >= 1.10.0 and < 1.19.1
Fixed in: 1.19.1
Safe to downgrade to: a release before 1.10.0
1. Check installed version
apt-cache policy allura || rpm -q allura || allura --version
2. UPGRADE to 1.19.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade allura
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade allura
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 1.10.0 (Debian / Ubuntu)
apt-cache madison allura
sudo apt install allura=<VERSION_BEFORE_1.10.0>
sudo apt-mark hold allura
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list allura
sudo dnf downgrade allura-<VERSION_BEFORE_1.10.0>
sudo dnf versionlock add allura
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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