CVE-2026-32605Network attack vector

Remote validator crash via off-by-one signer check

Published Apr 13, 2026 · Updated Apr 13, 2026

Out-of-bounds access in Nimiq core-rs-albatross before 1.3.0 allows remote attackers to crash validators via a signed proposal. ProposalSender::send accepts a signer index equal to validators.num_validators() because its upper-bound test uses > rather than >=, then get_validator_by_slot_band indexes past the validator set and panics before signature verification. Any untrusted network peer can deliver the crafted Tendermint proposal through gossip, terminating the validator process without data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Nimiq core-rs-albatross before 1.3.0 allows remote attackers to crash validators via a signed proposal. ProposalSender::send accepts a signer index equal to validators.num_validators() because its upper-bound test uses > rather than >=, then get_validator_by_slot_band indexes past the validator set and panics before signature verification. Any untrusted network peer can deliver the crafted Tendermint proposal through gossip, terminating the validator process without data disclosure or modification.

The record

CVE
CVE-2026-32605
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
Nimiq
Product
core-rs-albatross
Classifications
CWE-193, CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nimiq · core-rs-albatrossversion=< 1.3.0

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error
CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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