CVE-2026-34065 nimiq-primitives: Node crash due to missing interlink validation in election macro block proposals
An untrusted peer can crash a Nimiq node by sending an election macro block with invalid BLS keys, requiring an upgrade to the primitives library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34065?
CVE-2026-34065 is a high-severity denial of service vulnerability in nimiq-primitives, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
nimiq-primitives contains primitives (e.g., block, account, transaction) to be used in Nimiq's Rust implementation. Prior to version 1.3.0, an untrusted p2p peer can cause a node to panic by announcing an election macro block whose `validators` set contains an invalid compressed BLS voting key. Hashing an election macro header hashes `validators` and reaches `Validators::voting_keys()`, which calls `validator.voting_key.uncompress().unwrap()` and panics on invalid bytes. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.
Which versions are affected by CVE-2026-34065?
2 open source packages ship an affected version, including nimiq-primitives. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
nimiq-primitives crates.io | All versions to 0.2.0 | None |
nimiq-primitives crates.io | All versions to 0.2.0 | None |
Products include Nimiq Nimiq Proof-of-Stake.
How do I fix CVE-2026-34065?
No fix has been published for CVE-2026-34065 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-34065 being exploited?
There is no known exploitation of CVE-2026-34065 in the wild and no public exploit code.
Other vulnerabilities in nimiq-primitives
- CVE-2026-33471 nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation
- CVE-2026-40093 nimiq-blockchain is missing a wall-clock upper bound on block timestamps
- CVE-2026-34063 network-libp2p: Peer can crash the node by opening discovery protocol substream twice
- CVE-2026-32605 Nimiq: Remote crash via off-by-one signer bounds check in proposal buffer
- CVE-2026-33184 nimiq/core-rs-albatross: Discovery handshake limit could underflow and later provoke a deterministic overflow panic
Sources
Also known as GHSA-7c4j-2m43-2mgh.