CVE-2026-104435 json
Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output
published 2026-05-08 6 mo ago modified 2026-10-03 37 d ago also EUVD-2026-91445 , GHSA-pvmv-cwg8-v6c8
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- crates.io zebrad 4.4.1
- crates.io zebra-script 6.0.1
- ZcashFoundation zebra 4.4.1, 6.0.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 38 d ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 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 |
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H |
| CNA | 4.0 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | zebrad | <4.4.1 |
4.4.1 |
| crates.io | zebra-script | <6.0.1 |
6.0.1 |
Affected products
- ZcashFoundation zebra
Classification
References
-
github.com
/ZcashFoundation/zebra/security/advisories/GHSA-pvmv-cwg8-v6c8
vendor-advisory, web
-
vulncheck.com
/advisories/zebra-4.4.0-consensus-divergence-via-v5-sighash-single-without-output
third-party-advisory
-
github.com
/ZcashFoundation/zebra
package
Sources
- CVE List CVE-2026-104435
- GitHub Advisory GHSA-pvmv-cwg8-v6c8
- NVD CVE-2026-104435
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.