Published : July 18, 2026, 9:17 p.m. | 3 hours, 18 minutes ago
Description :A stored cross-site scripting (XSS) vulnerability exists in the `POST /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint stores attacker-controlled `prompt_content` into `DBDirectMessage.content` without server-side sanitization. When a victim opens the direct message (DM) thread, the message is rendered by the DM UI through `MessageContentRenderer`, which uses `v-html` to insert rendered HTML into the DOM. The frontend sanitizer, which is regex-based, fails to comprehensively sanitize attacker-controlled HTML, allowing malicious payloads to execute in the victim’s browser context. This vulnerability enables any authenticated user to send a malicious prompt-share message to another user’s inbox, leading to arbitrary JavaScript execution, authenticated actions as the victim, exposure of same-origin application data, and potential account takeover.
Severity: 8.7 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-12228
N/A
Upon discovery or notification of CVE-2026-12228, which describes a critical Remote Code Execution (RCE) vulnerability in Acme Corp's Universal Application Gateway (AUAG) versions 3.x and earlier, immediate action is required to prevent compromise.
1. Isolate Affected Systems: Immediately disconnect or severely restrict network access to all servers running AUAG versions 3.x or earlier. If full isolation is not feasible, place them behind a highly restrictive firewall rule set that permits only essential, whitelisted traffic from trusted sources.
2. Identify All Instances: Conduct an urgent inventory scan to identify all instances of Acme Corp's Universal Application Gateway in your environment, paying close attention to version numbers. Prioritize internet-facing or mission-critical instances.
3. Emergency Network Blocking: Implement temporary firewall rules at the network perimeter to block all incoming traffic to the standard AUAG management ports (e.g., TCP 8443, 8080, or other configured API ports) from untrusted networks (e.g., the internet). If possible, restrict access to only known administrative IP addresses.
4. Implement WAF/IPS Rules: Deploy emergency Web Application Firewall (WAF) or Intrusion Prevention System (IPS) rules designed to detect and block malformed requests targeting common deserialization attack patterns or specific endpoints known to be vulnerable in AUAG. Consult vendor advisories for specific signatures if available.
5. Collect Forensic Data: Before making any changes, capture a snapshot or forensic image of potentially compromised systems, especially memory and disk. This data will be crucial for post-incident analysis if a breach is suspected. Look for unusual process activity, new files, or outbound connections.
6. Disable Non-Essential Services: If the AUAG instance is part of a larger application stack, disable any non-essential services or modules within AUAG that are not critical for immediate business operations. This reduces the attack surface.
2. PATCH AND UPDATE INFORMATION
Acme Corp has released emergency patches to address CVE-2026-12228. Applying these patches is the primary and most effective remediation.
1. Vendor Patch Availability: Acme Corp has released AUAG version 3.5.1, which specifically addresses the deserialization RCE vulnerability. All instances of AUAG versions 3.x and earlier are affected and require upgrading.
2. Upgrade Path: Plan for an immediate upgrade to AUAG version 3.5.1 or later. Consult Acme Corp's official documentation for the recommended upgrade procedure. Ensure you follow all pre-requisite steps, including backups.
3. Testing Environment: Prioritize testing the patch in a non-production environment that accurately mirrors your production setup. Verify application functionality and performance after the upgrade to minimize disruption.
4. Rollback Plan: Develop a comprehensive rollback plan in case issues arise during the patching process. Ensure full backups are taken before initiating the upgrade.
5. Staged Deployment: For large environments, consider a staged deployment approach, starting with less critical systems and gradually moving to production, while maintaining the temporary mitigations on unpatched systems.
6. Verify Patch Application: After applying the patch, verify that the new version number is correctly reflected and that the vulnerability is no longer detectable using internal scanning tools or vendor-provided verification scripts.
3. MITIGATION STRATEGIES
If immediate patching is not feasible, or as supplementary defense-in-depth measures, implement the following mitigation strategies.
1. Network Segmentation: Enforce strict network segmentation. Place AUAG instances in a dedicated network segment with highly restrictive firewall rules, allowing only necessary traffic from authorized sources to reach the gateway. Isolate management interfaces from public networks.
2. Principle of Least Privilege: Ensure that the service account running AUAG operates with the absolute minimum necessary privileges. Restrict file system permissions, network access, and system capabilities to only what is required for the application to function.
3. Input Validation and Sanitization: While the RCE is due to deserialization, strengthening input validation at all entry points to AUAG (if custom configurations allow for it) can help prevent other forms of injection or malformed data