CVE-2026-104419Zebra before 6.3.0 Honest Peer Banning via Far-Ahead FindBlocks Hashes
Updated under an hour ago ()
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It affects ZcashFoundation zebra. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Zebra (zebrad) 4.5.0 before 6.3.0 discards which peer supplied the block hashes in FindBlocks responses, then assigns 100 misbehavior points, the ban threshold, to whichever peer serves a requested block more than 50,000 heights above the tip. A remote peer can return real far-ahead hashes to a syncing node so that honest peers get banned, eroding its peer set and raising eclipse risk.
- CVSS
- 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- Weakness (CWE)
- CWE-345
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ZcashFoundation zebra zcashfoundation:zebra (from the name) | before 6.3.0; 6.3.0 not affected | CNA record |
References
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qhr3-cvch-5fh2vendor-advisory
- https://www.vulncheck.com/advisories/zebra-before-6.3.0-honest-peer-banning-via-far-ahead-findblocks-hashesthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.