Vulnerability · Published Apr 22, 2026 · Assigned by GitHub_M

CVE-2026-34067nimiq-transaction vulnerable to panic via `HistoryTreeProof` length mismatch

Low 3.1

In plain English

A low-severity security flaw in nimiq-transaction from nimiq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.3%top 75.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

nimiq-transaction provides the transaction primitive to be used in Nimiq's Rust implementation. Prior to version 1.3.0, `HistoryTreeProof::verify` panics on a malformed proof where `history.len() != positions.len()` due to `assert_eq!(history.len(), positions.len())`. The proof object is derived from untrusted p2p responses (`ResponseTransactionsProof.proof`) and is therefore attacker-controlled at the network boundary until validated. A malicious peer could trigger a crash by returning a crafted inclusion proof with a length mismatch. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.

Affected products (as reported)

Vendor	Product	Versions
nimiq	nimiq-transaction	< 1.3.0

Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

References

https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-264v-m8fm-76jm x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3659 x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/commit/6ff0800e8e031363e787c827d8d033e5694e4e6a x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 x_refsource_MISC