ZEBRA: Denial of Service via Interrupted JSON-RPC Requests from Authenticated Clients
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-248.
Summary
ZEBRA is a Zcash node written entirely in Rust. From zebrad versions 2.2.0 to before 4.3.1 and from zebra-rpc versions 1.0.0-beta.45 to before 6.0.2, a vulnerability in Zebra's JSON-RPC HTTP middleware allows an authenticated RPC client to cause a Zebra node to crash by disconnecting before the request body is fully received. The node treats the failure to read the HTTP request body as an unrecoverable error and aborts the process instead of returning an error response. This issue has been patched in zebrad version 4.3.1 and zebra-rpc version 6.0.2.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ZcashFoundation | zebra | zebra-rpc >= 1.0.0-beta.45, < 6.0.2; zebrad >= 2.2.0, < 4.3.1 | — | No fix listed | CNA |
| — | zebra-rpc (crates.io) | 1.0.0-beta.45 to before 6.0.2 | 6.0.2 | Patch available | GHSA-29x4-r6jv-ff4w |
| — | zebrad (crates.io) | 2.2.0 to before 4.3.1 | 4.3.1 | Patch available | GHSA-29x4-r6jv-ff4w |
- zebra VendorZcashFoundation Affected zebra-rpc >= 1.0.0-beta.45, < 6.0.2; zebrad >= 2.2.0, < 4.3.1 Fixed in — No fix listed CNA
- zebra-rpc (crates.io) Vendor— Affected 1.0.0-beta.45 to before 6.0.2 Fixed in 6.0.2 Patch available GHSA-29x4-r6jv-ff4w
- zebrad (crates.io) Vendor— Affected 2.2.0 to before 4.3.1 Fixed in 4.3.1 Patch available GHSA-29x4-r6jv-ff4w
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zfnd:zebra-rpc:*:*:*:*:*:rust:*:* | 2.0.0 to before 6.0.2 | Vulnerable | ZcashFoundation |
| cpe:2.3:a:zfnd:zebra-rpc:1.0.0:-:*:*:*:rust:*:* | 1.0.0 | Vulnerable | ZcashFoundation |
| cpe:2.3:a:zfnd:zebra-rpc:1.0.0:beta45:*:*:*:rust:*:* | 1.0.0 beta45 | Vulnerable | ZcashFoundation |
| cpe:2.3:a:zfnd:zebra-rpc:1.0.0:beta46:*:*:*:rust:*:* | 1.0.0 beta46 | Vulnerable | ZcashFoundation |
| cpe:2.3:a:zfnd:zebrad:*:*:*:*:*:rust:*:* | 2.2.0 to before 4.3.1 | Vulnerable | ZcashFoundation |
- cpe:2.3:a:zfnd:zebra-rpc:*:*:*:*:*:rust:*:* Versions 2.0.0 to before 6.0.2 Vulnerable ·ZcashFoundation
- cpe:2.3:a:zfnd:zebra-rpc:1.0.0:-:*:*:*:rust:*:* Versions 1.0.0 Vulnerable ·ZcashFoundation
- cpe:2.3:a:zfnd:zebra-rpc:1.0.0:beta45:*:*:*:rust:*:* Versions 1.0.0 beta45 Vulnerable ·ZcashFoundation
- cpe:2.3:a:zfnd:zebra-rpc:1.0.0:beta46:*:*:*:rust:*:* Versions 1.0.0 beta46 Vulnerable ·ZcashFoundation
- cpe:2.3:a:zfnd:zebrad:*:*:*:*:*:rust:*:* Versions 2.2.0 to before 4.3.1 Vulnerable ·ZcashFoundation
Remediation
- Fix · GHSA-29x4-r6jv-ff4w zebra-rpc (crates.io) Fixed in 6.0.2 Advisory →
- Fix · GHSA-29x4-r6jv-ff4w zebrad (crates.io) Fixed in 4.3.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41585
- 2026-10-03 Alias added: GHSA-29x4-r6jv-ff4w
References
Sources
- CVE-2026-41585 · CVE Program
- CVE-2026-41585 · NVD
- FIRST EPSS
- GHSA-29x4-r6jv-ff4w · GitHub Advisory Database · CC BY 4.0
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