CVE-2026-34202
Unauthenticated remote crash in Zebra node via crafted V5 tx; patched in 4.3.0/6.0.1.
Is CVE-2026-34202 being exploited?
Not confirmed. CVE-2026-34202 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.73% probability of exploitation in the next 30 days.
How severe is CVE-2026-34202?
CVE-2026-34202 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-34202?
Yes. A fix has been recorded for CVE-2026-34202. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-34202 affect?
CVE-2026-34202 affects Zebra zebrad < 4.3.0, zebra-chain < 6.0.1, Zcash Zebra node. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-34202?
Upgrade to zebrad 4.3.0+ and zebra-chain 6.0.1+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote DoS: crash/panic of Zebra node during V5 txn processing; could disrupt validation and availability.
Immediate action required
- affected< 4.3.0
- affected< 6.0.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.