nimiq core-rs-albatross up to 1.2.x read_to_end allocation of resources

Summaryinfo

A vulnerability was found in nimiq core-rs-albatross up to 1.2.x. It has been rated as problematic. Affected by this vulnerability is the function read_to_end. The manipulation leads to allocation of resources. This vulnerability is documented as CVE-2026-34062. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in nimiq core-rs-albatross up to 1.2.x and classified as problematic. This issue affects the function read_to_end. 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. The summary by CVE is:

nimiq-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, `MessageCodec::read_request` and `read_response` call `read_to_end()` on inbound substreams, so a remote peer can send only a partial frame and keep the substream open. because `Behaviour::new` also sets `with_max_concurrent_streams(1000)`, the node exposes a much larger stalled-slot budget than the library default. The patch for this vulnerability is formally released as part of v1.3.0. No known workarounds are available.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-34062 since 03/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.3.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch c021a5337b808c73571b44999f9753051bac7508 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

Vendor

• nimiq

Name

• core-rs-albatross

Version

• 1.0
• 1.1
• 1.2

License

• open-source

Website

• Product: https://github.com/nimiq/core-rs-albatross/

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