CVE-2026-29519

HIGH

Lucee CFML Server Reflected XSS via URL Path Parsing

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-29519. PoCs published by L4V4D0.

AI-analyzed exploit summary This repository provides a proof-of-concept for CVE-2026-29519, a reflected XSS vulnerability in Lucee CFML's URL path parsing mechanism. The PoC demonstrates arbitrary JavaScript execution via a crafted URL containing an HTML img tag with an onerror handler.

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.

Exploits (1)

github WORKING POC
by L4V4D0 · poc
https://github.com/L4V4D0/CVE-2026-29519-Lucee-Reflected-XSS

This repository provides a proof-of-concept for CVE-2026-29519, a reflected XSS vulnerability in Lucee CFML's URL path parsing mechanism. The PoC demonstrates arbitrary JavaScript execution via a crafted URL containing an HTML img tag with an onerror handler.

Classification
Working Poc 98%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Lucee CFML Server versions 5.3.1.95 to 7.0.0.395 and 7.x snapshots
No auth needed
Prerequisites: Victim must click on a malicious link or visit a crafted URL · Target must be running a vulnerable version of Lucee CFML
mistral-large-3 · analyzed Jul 10, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit technical-description exploit
Researcher Disclosure
https://github.com/L4V4D0/CVE-2026-29519-Lucee-Reflected-XSS

Scores

CVSS v3 8.2
EPSS 0.0039
EPSS Percentile 31.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
lucee/Lucee 5.3.1.95 - 7.0.0.395
Published Jul 10, 2026
Tracked Since Jul 10, 2026