nimiq core-rs-albatross up to 1.3.x addresses.first unusual condition

Summaryinfo

A vulnerability was found in nimiq core-rs-albatross up to 1.3.x. It has been classified as problematic. This affects the function addresses.first. Performing a manipulation results in unusual condition. This vulnerability is identified as CVE-2026-40094. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in nimiq core-rs-albatross up to 1.3.x. This affects the function addresses.first. The manipulation with an unknown input leads to a unusual condition vulnerability. CWE is classifying the issue as CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. This is going to have an impact on availability. The summary by CVE is:

nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In versions 1.3.0 and prior, network-libp2p discovery accepts signed PeerContact updates from untrusted peers and stores them in a peer contact book, eventually leading to address book crash. A PeerContact can legally contain an empty addresses list (no intrinsic validation enforces non-empty). Later, PeerContactBook::known_peers builds an address book by taking addresses.first().expect("every peer should have at least one address"). If the attacker has inserted a signed peer contact with addresses=[], any call to get_address_book (RPC/web client) can panic and crash the node/RPC task depending on panic settings. This issue has been fixed in version 1.4.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-40094 since 04/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.4.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31195). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• nimiq

Name

• core-rs-albatross

Version

• 1.0
• 1.1
• 1.2
• 1.3

Website

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

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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