CVE-2026-34069: CWE-617: Reachable Assertion in nimiq core-rs-albatross
A reachable assertion vulnerability exists in nimiq/core-rs-albatross versions 1. 2. 2 and below. An unauthenticated peer can send a crafted RequestMacroChain message that causes the handler to panic due to improper handling of block hashes. This leads to a denial of service condition by crashing the task handling the message. The issue is fixed in version 1. 3. 0.
AI Analysis
Technical Summary
The vulnerability (CVE-2026-34069) affects the Rust implementation of the Nimiq Proof-of-Stake protocol (core-rs-albatross) prior to version 1.3.0. An unauthenticated peer can trigger a panic in the RequestMacroChain message handler by sending a message where the first locator hash on the victim’s main chain is a micro block hash instead of a macro block hash. The handler incorrectly assumes the selected hash is always a macro block and calls unwrap() on a result that fails, causing a panic (CWE-617: Reachable Assertion). This results in a denial of service by crashing the handler task.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by crashing the RequestMacroChain message handler task. There is no impact on confidentiality or integrity, only availability is affected. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade to version 1.3.0 or later of nimiq/core-rs-albatross where this issue is fixed. Patch status is not explicitly stated but the fix is included in version 1.3.0. Until upgraded, consider restricting unauthenticated peer connections if possible to reduce exposure.
CVE-2026-34069: CWE-617: Reachable Assertion in nimiq core-rs-albatross
Description
A reachable assertion vulnerability exists in nimiq/core-rs-albatross versions 1. 2. 2 and below. An unauthenticated peer can send a crafted RequestMacroChain message that causes the handler to panic due to improper handling of block hashes. This leads to a denial of service condition by crashing the task handling the message. The issue is fixed in version 1. 3. 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2026-34069) affects the Rust implementation of the Nimiq Proof-of-Stake protocol (core-rs-albatross) prior to version 1.3.0. An unauthenticated peer can trigger a panic in the RequestMacroChain message handler by sending a message where the first locator hash on the victim’s main chain is a micro block hash instead of a macro block hash. The handler incorrectly assumes the selected hash is always a macro block and calls unwrap() on a result that fails, causing a panic (CWE-617: Reachable Assertion). This results in a denial of service by crashing the handler task.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by crashing the RequestMacroChain message handler task. There is no impact on confidentiality or integrity, only availability is affected. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade to version 1.3.0 or later of nimiq/core-rs-albatross where this issue is fixed. Patch status is not explicitly stated but the fix is included in version 1.3.0. Until upgraded, consider restricting unauthenticated peer connections if possible to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-25T16:21:40.867Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69dd877882d89c981f920dc4
Added to database: 4/14/2026, 12:16:56 AM
Last enriched: 4/14/2026, 12:32:01 AM
Last updated: 4/14/2026, 9:33:42 AM
Views: 11
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