opensource-socialnetwork up to 8.x allocation of resources

Summaryinfo

A vulnerability categorized as critical has been discovered in opensource-socialnetwork up to 8.x. Affected is an unknown function. Executing a manipulation can lead to allocation of resources. This vulnerability appears as CVE-2026-41309. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in opensource-socialnetwork up to 8.x and classified as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect confidentiality, and availability. CVE summarizes:

Open Source Social Network (OSSN) is open-source social networking software developed in PHP. Versions prior to 9.0 are vulnerable to resource exhaustion. An attacker can upload a specially crafted image with extreme pixel dimensions (e.g., $10000 \times 10000$ pixels). While the compressed file size on disk may be small, the server attempts to allocate significant memory and CPU cycles during the decompression and resizing process, leading to a Denial of Service (DoS) condition. It is highly recommended to upgrade to OSSN 9.0. This version introduces stricter validation of image dimensions and improved resource management during the processing phase. Those who cannot upgrade immediately can mitigate the risk by adjusting their `php.ini` settings to strictly limit `memory_limit` and `max_execution_time` and/or implementing a client-side and server-side check on image headers to reject files exceeding reasonable pixel dimensions (e.g., $4000 \times 4000$ pixels) before processing begins.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-41309 since 04/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 9.0 eliminates this vulnerability. Applying the patch 12357113b3be189da7f6e429979a464e4f982117 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• opensource-socialnetwork

Version

• 8.x

License

• open-source

Website

• Product: https://github.com/opensource-socialnetwork/opensource-socialnetwork/

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