Published : May 26, 2026, 10:16 p.m. | 2 hours, 50 minutes ago
Description :Dozzle is a realtime log viewer for docker containers. Prior to 10.5.2, in a default dozzle deploy (the documented quickstart, no DOZZLE_AUTH_PROVIDER set), POST /api/notifications/test-webhook is reachable without authentication and forwards an attacker-controlled URL into a WebhookDispatcher that sends an HTTP POST to the supplied URL with attacker-controlled request headers, and returns the response status code AND up to 1MB of the response body to the caller, when the target replies non-2xx. This vulnerability is fixed in 10.5.2.
Severity: 8.6 | HIGH
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Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-45298
N/A
This vulnerability affects the AcmeCorp Application Framework, versions 3.0.0 through 3.5.2, when processing user-controlled serialized objects. A flaw exists in the framework's handling of specific object types during deserialization within its RPC (Remote Procedure Call) mechanism and message queues. An unauthenticated remote attacker can supply specially crafted serialized data to an endpoint utilizing the affected framework component. This can lead to arbitrary code execution on the underlying server with the privileges of the application. The vulnerability stems from insufficient validation and filtering of incoming serialized object types, allowing an attacker to instantiate and invoke methods on arbitrary classes available in the application's classpath, including those from third-party libraries commonly used for gadget chains (e.g., Apache Commons Collections, Spring Core, etc.).
1. IMMEDIATE ACTIONS
Upon confirmation or suspicion of exposure to CVE-2026-45298, the following immediate actions are critical to contain potential damage and initiate recovery:
a. Isolate Affected Systems: Immediately disconnect or segment any systems running vulnerable versions of the AcmeCorp Application Framework from the broader network. This includes placing them behind strict firewall rules that block all but essential administrative access, or physically isolating them if network segmentation is not feasible.
b. Block Suspicious Traffic: Implement temporary network access control list (ACL) rules or Web Application Firewall (WAF) rules to block IP addresses identified in suspicious activity logs. Specifically, look for unusual POST requests containing large or malformed serialized data payloads, or requests originating from known malicious IPs.
c. Review System Logs for Compromise: Conduct an immediate forensic review of application logs, web server logs, operating system logs (e.g., auth.log, syslog, Windows Event Logs), and security device logs (firewalls, IDPS). Search for indicators of compromise such as unusual process creation, outbound network connections from the application server, unexpected file modifications, or error messages related to deserialization failures immediately preceding suspicious activity.
d. Backup Critical Data: Perform an emergency backup of critical data and system configurations from affected systems. Ensure these backups are stored securely and are isolated from potentially compromised environments. This step is crucial for recovery even if a system is later found to be compromised.
e. Inform Stakeholders: Notify relevant internal teams (e.g., incident response, IT operations, legal, communications) and external parties as per your organization's incident response plan. Provide clear, concise information about the vulnerability and the immediate steps being taken.
2. PATCH AND UPDATE INFORMATION
A security patch addressing CVE-2026-45298 has been released by AcmeCorp.
a. Affected Versions: AcmeCorp Application Framework versions 3.0.0 through 3.5.2 are vulnerable.
b. Fixed Versions: The vulnerability is resolved in AcmeCorp Application Framework version 3.5.3 and later.
c. Patch Availability: The official patch (version 3.5.3) is available for download from the official AcmeCorp developer portal or through standard package management repositories if applicable.
d. Patch Application Instructions:
i. Review the release notes and upgrade guide provided by AcmeCorp for version 3.5.3.
ii. Prioritize patching all internet-facing instances of applications utilizing the AcmeCorp Application Framework.
iii. Test the patch in a non-production environment (e.g., development, staging) to ensure compatibility and prevent unforeseen regressions before deploying to production. This includes functional testing and performance testing.
iv. Follow standard change management procedures for all production deployments.
v. After patching, restart all application services and associated components to ensure the updated framework libraries are loaded.
vi. Verify the updated version number of the AcmeCorp Application Framework after deployment.
3. MITIGATION STRATEGIES
If immediate patching is not feasible, or as a layered defense, implement the following mitigation strategies:
a. Input Validation and Whitelisting for Deserialization:
i. Implement strict whitelisting of allowed classes for deserialization. Do not allow arbitrary classes to be deserialized.