What is GHSA-2qvh-q2cj-955r?

GHSA-2qvh-q2cj-955r is a security advisory published by GitHub Security Advisories with Medium severity. The getblock RPC method in zebra-rpc before 11.0.0, used by the Zcash Foundation's Zebra node,...

Which CVE IDs does GHSA-2qvh-q2cj-955r cover?

GHSA-2qvh-q2cj-955r covers the following CVE IDs: CVE-2026-104428. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-2qvh-q2cj-955r?

GHSA-2qvh-q2cj-955r has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

GHSA-2qvh-q2cj-955rMediumCVSS 5.3

The getblock RPC method in zebra-rpc before 11.0.0, used by the Zcash Foundation's Zebra node,...

Vendor

GitHub Security Advisories

Published

October 2, 2026

Last Modified

October 2, 2026

🔗 CVE IDs covered (1)

CVE-2026-104428 →

📋 Description

The getblock RPC method in zebra-rpc before 11.0.0, used by the Zcash Foundation's Zebra node, panics on verbosity 2 for a side-chain block because the block's -1 confirmations sentinel is converted to u32 with .expect(), aborting the process. Remote unauthenticated attackers, directly or through lightwalletd, can repeat this call to keep the node in a crash loop.

🔗 References (4)

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-x6v8-c2xp-928m
https://nvd.nist.gov/vuln/detail/CVE-2026-104428
https://www.vulncheck.com/advisories/zebra-before-11.0.0-denial-of-service-via-getblock-verbosity-2
https://github.com/advisories/GHSA-2qvh-q2cj-955r