Vulnerability · Published May 25, 2026 · Assigned by VulDB

CVE-2026-9498Dromara lamp-cloud Message Template GroovyClassLoader.parseClass special elements used in a template engine

Medium 6.3

In plain English

A medium-severity security flaw in lamp-cloud from Dromara. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.3%top 77.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in Dromara lamp-cloud up to 5.6.2. Impacted is the function GroovyClassLoader.parseClass of the component Message Template Handler. Such manipulation of the argument DefMsgTemplate.content leads to improper neutralization of special elements used in a template engine. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
Dromara	lamp-cloud	5.6.05.6.15.6.2

Weakness: CWE-1336, CWE-791 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-365481 | Dromara lamp-cloud Message Template GroovyClassLoader.parseClass special elements used in a template engine vdb-entry, technical-description
VDB-365481 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #814103 | dromara lamp-cloud releases Injection third-party-advisory
https://github.com/Ku4D3/bug_story/blob/main/report_02.md exploit