Vulnerability · Published Apr 13, 2026 · Assigned by GitHub_M

CVE-2026-32605Nimiq: Remote crash via off-by-one signer bounds check in proposal buffer

High 7.5

In plain English

A high-severity out-of-bounds read in core-rs-albatross from nimiq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 59.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.3.0, an untrusted peer could crash a validator by publishing a signed tendermint proposal message where signer == validators.num_validators(). ProposalSender::send uses > instead of >= for the signer bounds check, so the equality case passes and reaches validators.get_validator_by_slot_band(signer), which panics with an out-of-bounds index before any signature verification runs. This issue has been fixed in version 1.3.0.

Affected products (as reported)

Vendor	Product	Versions
nimiq	core-rs-albatross	< 1.3.0

Weakness: CWE-125, CWE-193 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-g99c-h7j7-rfhv x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3661 x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/commit/9199364b60c7acae4219800d194bbe07d2997b8c x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 x_refsource_MISC