CVE-2026-29519 Lucee CFML Server Reflected XSS via URL Path Parsing
Unauthenticated attackers can execute arbitrary JavaScript in victims' browsers via crafted URLs, potentially hijacking sessions or compromising the Lucee admin interface.
- 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-2026-29519?
CVE-2026-29519 is a medium-severity cross-site scripting vulnerability in Lucee, published on 10 Jul 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
Lucee CFML Server versions across the 5.3.x, 6.1.x, 6.2.x, and 7.0.x release lines contain a reflected cross-site scripting vulnerability in URL path parsing that allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser by embedding HTML or JavaScript payloads within the request path. Attackers can craft a malicious URL containing injected script content that is reflected in the server's response without proper output encoding, enabling session hijacking or unauthorized actions against the Lucee administrative interface when a victim visits the crafted link.
Weakness: CWE-79
Which versions are affected by CVE-2026-29519?
How do I fix CVE-2026-29519?
No fix has been published for CVE-2026-29519 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-2026-29519 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29519 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-frv8-q5jq-3qhq.