CVE-2026-104435CWE-347

CVE-2026-104435

High · published October 2, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
9.9
In the wild
Unconfirmed
What it is

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects, causing a network consensus split.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00205 · 9.9th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-10-02T16:17Z
References (2)
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-pvmv-cwg8-v6c8 · [email protected]https://www.vulncheck.com/advisories/zebra-4.4.0-consensus-divergence-via-v5-sighash-single-without-output · [email protected]
EPSS history
Timeline
  • 04 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 02 OCT 11:38Z
    Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output
    cvelistv5