CVE-2026-29519 lucee CVE debrief

Who should care

Users of Lucee CFML Server versions across the 5.3.x, 6.1.x, 6.2.x, and 7.0.x release lines should apply patches or mitigations to prevent exploitation of this vulnerability. This includes operators, platform administrators, vulnerability management teams, and security teams responsible for ensuring the security and integrity of affected systems.

Technical summary

The vulnerability exists in the URL path parsing of Lucee CFML Server, allowing attackers to inject malicious scripts. The CVSS score for this vulnerability is 6.2, with a severity rating of MEDIUM. Affected product deployments should be identified and prioritized for patching or mitigation. The vulnerability allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser by embedding HTML or JavaScript payloads within the request path.

Defensive priority

Apply patches or mitigations to prevent exploitation of this vulnerability. Prioritize patching or mitigation based on the severity of the vulnerability and the potential impact on the organization.

Recommended defensive actions

• Apply patches or updates to Lucee CFML Server versions across the 5.3.x, 6.1.x, 6.2.x, and 7.0.x release lines.
• Implement input validation and output encoding to prevent injection of malicious scripts.
• Monitor Lucee CFML Server logs for suspicious activity.
• Restrict access to the Lucee administrative interface.
• Consider implementing a web application firewall to detect and prevent exploitation.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

The CVE record was published on 2026-07-10T15:16:39.007Z and was last modified on 2026-07-10T17:56:00.910Z. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD information. Defenders should verify Lucee CFML Server versions across the 5.3.x, 6.1.x, 6.2.x, and 7.0.x release lines for potential exposure.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.