Is CVE-2026-104419 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-104419?

CVE-2026-104419 has a CVSS v3 severity of MEDIUM (4.8).

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CVE-2026-104419

Description

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.