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.
CVE-2026-104419
MEDIUMPre-NVD 4.84.8—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 4.8 from GitHub Security Advisory published 2026-10-02. A secondary CVSS source baseline 4.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 4.8Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 4.8
- EG Score
- 4.8MEDIUMhigh confidence
- EG Risk
- 26EG Risk 26/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity48% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.1%
- EPSS %ILE
- 1st
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 2, 2026
Last Modified
October 2, 2026
Advisory Details (2)
Auto-updated Oct 2, 2026Patch available. Sources: github.
generic
Zebra before 6.3.0 Honest Peer Banning via Far-Ahead FindBlocks Hashes | Advisories | VulnCheck
https://www.vulncheck.com/advisories/zebra-before-6.3.0-honest-peer-banning-via-far-ahead-findblocks-hashesgithub Patch Available
Far-ahead FindBlocks hashes cause Zebra to ban honest peers that serve requested blocks · Advisory · ZcashFoundation/zebra · GitHub
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qhr3-cvch-5fh2Vendor Advisories for CVE-2026-104419(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 10× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-03 16:33 UTCEG score recompute
- 2026-10-03 16:33 UTCGHSA enrichment
- 2026-10-03 14:25 UTCEPSS rescore
- 2026-10-02 18:13 UTCGHSA enrichment
- 2026-10-02 18:13 UTCGHSA enrichment
- 2026-10-02 18:12 UTCEG score recompute
- 2026-10-02 18:12 UTCGHSA enrichment
- 2026-10-02 12:24 UTCEG score recompute
- 2026-10-02 11:49 UTCEG score recompute
- 2026-10-02 11:45 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-104419?
CVE-2026-104419 is a medium vulnerability published on October 2, 2026. 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…
When was CVE-2026-104419 disclosed?
CVE-2026-104419 was first published on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-104419 actively exploited?
CVE-2026-104419 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104419?
CVE-2026-104419 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104419?
A fix for CVE-2026-104419 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-104419 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-104419
Is Your Infrastructure Affected by CVE-2026-104419?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.