CVE-2026-91996 dromara CVE debrief

Who should care

Defenders and administrators of lamp-cloud instances should assess exposure and potential impact of this vulnerability. This includes verifying instance configuration and access controls, especially those with anonymous access enabled. Security teams and vulnerability management teams should prioritize remediation due to the high severity of the vulnerability and potential for sensitive information disclosure.

Why it matters

CVE-2026-91996 is a high-severity vulnerability in lamp-cloud that allows unauthenticated access to JVM system properties, potentially exposing sensitive information. Defenders should prioritize verifying exposure and assessing impact.

• Potential unauthorized access to sensitive JVM system properties
• Possible exposure of JVM classpath, filesystem paths, operating system details, and startup secrets
• Verification of lamp-cloud instance configuration and access controls is necessary
• Remediation priority is high due to potential for sensitive information disclosure

Technical summary

The lamp-cloud through version 5.10.0 has a vulnerability that allows unauthenticated attackers to read the server's full JVM system property map by sending POST requests to /defGenProject/anno/getProperties. This could expose sensitive information, including JVM classpath, filesystem paths, operating system details, and startup secrets. The vulnerability exists due to whitelisting of the path pattern /*/anno/** for anonymous access. Defenders should prioritize verifying exposure of lamp-cloud instances and assess the impact of potential unauthorized access to JVM system properties.

Defensive priority

Defenders should prioritize verifying exposure of lamp-cloud instances, especially those with anonymous access enabled, and assess the impact of potential unauthorized access to JVM system properties.

Recommended defensive actions

• Verify exposure of lamp-cloud instances, especially those with anonymous access enabled
• Assess the impact of potential unauthorized access to JVM system properties
• Restrict access to the /defGenProject/anno/getProperties endpoint
• Monitor for suspicious activity related to JVM system property access
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in lamp-cloud through 5.10.0, which allows unauthenticated attackers to read the server's full JVM system property map. Evidence is based on official CVE metadata and NVD vulnerability assessment. Defenders should verify exposure and assess potential impact based on this information. The vulnerability affects lamp-cloud instances with anonymous access enabled. Verification of instance configuration and access controls is necessary.

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.