CVE-2026-59694
Unauthenticated clients can inflate gas fees via forged EIP-2930 access lists.
Is CVE-2026-59694 being exploited?
Not confirmed. CVE-2026-59694 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 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-59694?
CVE-2026-59694 is rated High with a CVSS score of 8.3. 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-2026-59694?
Yes. A fix has been recorded for CVE-2026-59694. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-59694 affect?
CVE-2026-59694 affects ZenHive mpp (Elixir) < 0.6.0, Services using mpp with fee_payer: true, Fee-payer wallets co-signing EIP-2930 transactions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-59694?
Upgrade to mpp >=0.6.0; validate/reject large access-lists; restrict co-signing.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can cause fee-payer to pay massively inflated gas per transaction, draining sponsor wallets and destroying margins.
Immediate action required
- affected>= 0.2.0 and < 0.6.0
- affected>= d29d54e507918db00a5b65d90136b73166c017d7 and < 5d6338e2334084c5f2a78cfcca474830733ed7e8
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.