nimiq-transaction: Panic via `HistoryTreeProof` length mismatch

CVE-2026-34067 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

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.

Patches

The patch for this vulnerability is included as part of v1.3.0.

Workarounds

No known workarounds know.

Basic information

Type
reviewed
Severity
low
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-04-22 19:20:50 UTC
Updated
2026-04-27 16:22:44 UTC
GitHub reviewed
2026-04-22 19:20:50 UTC
NVD published
2026-04-22 21:17:07 UTC

EPSS Score

Score Percentile
0.01% 1.23%

CVSS Scores

Base score Version Severity Vector
3.1 3.1 —
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.

Identifiers

Type Value
GHSA GHSA-264v-m8fm-76jm ↗
CVE CVE-2026-34067 ↗

CWEs

CWE id Name
CWE-617 Reachable Assertion

Credits

  • 1seal (finder)
  • paberr (analyst)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
rust nimiq-transaction <= 0.2.0 — —

References

cvelogic Threat Intelligence