HKUDS nanobot up to 0.2.0 allocation of resources

Summaryinfo

A vulnerability was found in HKUDS nanobot up to 0.2.0. It has been declared as problematic. This impacts an unknown function. Such manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-49140. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in HKUDS nanobot up to 0.2.0 and classified as problematic. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

Nanobot prior to version 0.2.1 contains a denial of service vulnerability in the Matrix channel media download handler that allows authenticated room members to exhaust process memory and bandwidth by sending media events with missing or invalid size metadata. Attackers can send multiple concurrent Matrix media events with omitted or invalid declared sizes to trigger simultaneous large media downloads that fully materialize response bodies before post-download rejection, consuming process resources until service degradation occurs.

The weakness was disclosed by Chia Min Jun Lennon. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-49140 since 05/27/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 0.2.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 1d4000560dfff1acb83f5c5ca8ef3ab1f092bd14 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• HKUDS

Name

• nanobot

Version

• 0.1
• 0.2.0

License

• open-source

Website

• Product: https://github.com/HKUDS/nanobot/

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CPE 2.2info

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