ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when deserializing addr or addrv2 messages, which contain vectors of addresses, Zebra would fully deserialize them up to a maximum length (over 233,000) that was derived from the 2 MiB message size limit. This is much larger than the actual limit of 1,000 messages from the specification. Zebra would eventually check that limit but, at that point, the memory for the larger vector was already allocated. An attacker could cause out-of-memory aborts in Zebra by sending multiple such messages over different connections. This vulnerability is fixed in zebrad version 4.3.0 and zebra-network version 5.0.1.
References
| Link | Resource |
|---|---|
| https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-xr93-pcq3-pxf8 | Vendor Advisory |
| https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-xr93-pcq3-pxf8 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
27 Apr 2026, 18:24
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Zfnd
Zfnd zebra-network Zfnd zebrad |
|
| CPE | cpe:2.3:a:zfnd:zebrad:*:*:*:*:*:rust:*:* cpe:2.3:a:zfnd:zebra-network:*:*:*:*:*:rust:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| References | () https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-xr93-pcq3-pxf8 - Vendor Advisory |
21 Apr 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-xr93-pcq3-pxf8 - |
21 Apr 2026, 20:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-21 20:17
Updated : 2026-04-27 18:24
NVD link : CVE-2026-40881
Mitre link : CVE-2026-40881
CVE.ORG link : CVE-2026-40881
JSON object : View
Products Affected
zfnd
- zebra-network
- zebrad
CWE
CWE-770
Allocation of Resources Without Limits or Throttling