CVE-2026-82546 Apache Roller: Stored cross-site scripting through incoming Trackback links
Unauthenticated attackers can inject malicious scripts via Trackback links in Apache Roller, leading to script execution in the victim's browser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82546?
CVE-2026-82546 is a medium-severity cross-site scripting vulnerability in Apache Roller, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows an unauthenticated remote attacker to store a crafted comment-author URL through the incoming Trackback endpoint when a published entry accepts comments and Trackbacks. The shipped Trackback, verification and moderation defaults allow the value to be approved and rendered as an active link; a visitor who clicks the link executes script in the weblog's origin. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which removes incoming Trackback support and suppresses non-HTTP(S) comment-author links. Users unable to upgrade should disable Trackbacks and remove untrusted Trackback comments.
Weakness: CWE-79
Which versions are affected by CVE-2026-82546?
How do I fix CVE-2026-82546?
No fix has been published for CVE-2026-82546 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-82546 being exploited?
There is no known exploitation of CVE-2026-82546 in the wild and no public exploit code.
Sources
Also known as GHSA-mw5j-2pgh-fm6m.