nimiq core-rs-albatross up to 1.2.x assertion

Summaryinfo

A vulnerability has been found in nimiq core-rs-albatross up to 1.2.x and classified as problematic. The impacted element is an unknown function. This manipulation causes assertion. This vulnerability is tracked as CVE-2026-34063. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in nimiq core-rs-albatross up to 1.2.x. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a assertion vulnerability. The CWE definition for the vulnerability is CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. As an impact it is known to affect availability. The summary by CVE is:

Nimiq's network-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, `network-libp2p` discovery uses a libp2p `ConnectionHandler` state machine. the handler assumes there is at most one inbound and one outbound discovery substream per connection. if a remote peer opens/negotiate the discovery protocol substream a second time on the same connection, the handler hits a `panic!(\"Inbound already connected\")` / `panic!(\"Outbound already connected\")` path instead of failing closed. This causes a remote crash of the networking task (swarm), taking the node's p2p networking offline until restart. 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. This vulnerability is known as CVE-2026-34063 since 03/25/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.3.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch e0d4e01994f061bf41d3c2835bc74040d3c084f5 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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