CVE-2026-110669 in sar2html
Summary
by MITRE • 10/15/2026
A security vulnerability has been detected in cemtan sar2html 4.0.0. This affects the function deleteHost/deleteRange/deleteAll of the file sar2html.py. Such manipulation leads to missing authentication. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified in cemtan sar2html version 4.0.0 represents a critical authentication bypass within the application's host management functionality. Specifically, the flaw resides in three distinct functions: deleteHost, deleteRange, and deleteAll, which are implemented in the primary Python script file named sar2html.py. These functions are designed to remove monitoring data or configurations associated with specific hosts from the Simple Network Management Protocol (SNMP) archive reports generated by the tool. However, due to a failure in implementing proper access control checks, these administrative actions can be executed without requiring valid user credentials. This absence of authentication enforcement allows any remote actor who has network connectivity to the service to manipulate system state arbitrarily, effectively bypassing security boundaries that should restrict such operations to authorized administrators only.
From a technical perspective, this issue is classified as an improper access control vulnerability where the application fails to verify whether the requesting entity possesses the necessary privileges before performing sensitive actions. In the context of Common Weakness Enumeration standards, this aligns closely with CWE-287: Improper Authentication and potentially CWE-915: Improper Control of Dynamically-Identified Variables if the input parameters for host deletion are not sufficiently sanitized or validated against an authorized user list prior to execution. The vulnerability stems from a logical error in the web application framework's middleware or route handlers, where the authentication decorator or check is either missing entirely or incorrectly configured for these specific endpoints. Consequently, the server processes requests to delete hosts based solely on the presence of valid HTTP parameters rather than verifying the identity and permissions of the user making the request.
The operational impact of this vulnerability is severe due to its remote exploitability and public disclosure status. An attacker can leverage publicly available proof-of-concept code to execute denial-of-service attacks by deleting critical monitoring data, thereby blinding administrators to system performance issues or security incidents. Furthermore, depending on how sar2html integrates with downstream systems, the deletion of host records could disrupt automated alerting mechanisms or reporting pipelines that rely on continuous data availability. Since the exploit has been disclosed publicly and is known to be functional, the window for remediation is critical as malicious actors are likely already scanning for instances of this vulnerable version in production environments. The lack of response from the project maintainers exacerbates the risk, leaving users without official patches or guidance on how to mitigate the issue through configuration changes alone.
To address this vulnerability, immediate mitigation strategies should focus on restricting access to the affected endpoints until a patched version is available. Administrators can implement network-level controls such as firewall rules or reverse proxy configurations that limit access to sar2html management interfaces exclusively to trusted IP addresses or internal subnets. Additionally, if the application supports basic authentication headers, ensuring these are enforced at the web server level rather than relying solely on the application logic can provide a layer of defense in depth. It is also advisable to monitor logs for unusual patterns of host deletion requests and to disable any unnecessary administrative features if they are not required for daily operations. Users should prioritize upgrading to a secure version once released by the vendor or consider alternative monitoring visualization tools that adhere to stricter security standards, such as those compliant with OWASP Top 10 guidelines regarding broken access control.