CVE-2026-41584: CWE-617: Reachable Assertion in ZcashFoundation zebra
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-chain version 6.0.2, Orchard transactions contain a rk field which is a randomized validating key and also an elliptic curve point. The Zcash specification allows the field to be the identity (a "zero" value), however, the orchard crate which is used to verify Orchard proofs would panic when fed a rk with the identity value. Thus an attacker could send a crafted transaction that would make a Zebra node crash. This issue has been patched in zebrad version 4.3.1 and zebra-chain version 6.0.2.
AI Analysis
Technical Summary
Zebra, a Zcash node implementation written in Rust, had a vulnerability where the orchard crate would panic if the rk field in an Orchard transaction was the identity element, causing a reachable assertion failure and node crash. This is due to the orchard crate not handling the zero value of the rk field correctly, despite it being valid per the Zcash specification. Versions prior to zebrad 4.3.1 and zebra-chain 6.0.2 are affected. The vulnerability is tracked as CVE-2026-41584 with a CVSS 4.0 score of 9.2 (critical).
Potential Impact
An attacker can craft a transaction with the rk field set to the identity value, causing the Zebra node to crash due to a panic in the orchard crate. This results in a denial of service condition for affected Zebra nodes. There is no indication of privilege escalation or data compromise. No known exploits in the wild have been reported.
Mitigation Recommendations
This vulnerability has been patched in zebrad version 4.3.1 and zebra-chain version 6.0.2. Users should upgrade to these versions or later to remediate the issue. No other mitigation steps are indicated.
CVE-2026-41584: CWE-617: Reachable Assertion in ZcashFoundation zebra
Description
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-chain version 6.0.2, Orchard transactions contain a rk field which is a randomized validating key and also an elliptic curve point. The Zcash specification allows the field to be the identity (a "zero" value), however, the orchard crate which is used to verify Orchard proofs would panic when fed a rk with the identity value. Thus an attacker could send a crafted transaction that would make a Zebra node crash. This issue has been patched in zebrad version 4.3.1 and zebra-chain version 6.0.2.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Zebra, a Zcash node implementation written in Rust, had a vulnerability where the orchard crate would panic if the rk field in an Orchard transaction was the identity element, causing a reachable assertion failure and node crash. This is due to the orchard crate not handling the zero value of the rk field correctly, despite it being valid per the Zcash specification. Versions prior to zebrad 4.3.1 and zebra-chain 6.0.2 are affected. The vulnerability is tracked as CVE-2026-41584 with a CVSS 4.0 score of 9.2 (critical).
Potential Impact
An attacker can craft a transaction with the rk field set to the identity value, causing the Zebra node to crash due to a panic in the orchard crate. This results in a denial of service condition for affected Zebra nodes. There is no indication of privilege escalation or data compromise. No known exploits in the wild have been reported.
Mitigation Recommendations
This vulnerability has been patched in zebrad version 4.3.1 and zebra-chain version 6.0.2. Users should upgrade to these versions or later to remediate the issue. No other mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-21T14:15:21.959Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fdff95cbff5d8610e6d6fc
Added to database: 5/8/2026, 3:21:57 PM
Last enriched: 5/8/2026, 3:36:47 PM
Last updated: 5/9/2026, 3:47:55 AM
Views: 5
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