BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit…
Priority LOW 30CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-347.
Summary
BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.
Why it matters now
EPSS 0.00863 58th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:satoshilabs:trezor_model_t_firmware:*:*:*:*:*:*:*:* | before 2.3.1 | Vulnerable | Satoshilabs |
| cpe:2.3:h:satoshilabs:trezor_model_t:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Satoshilabs |
| cpe:2.3:o:satoshilabs:trezor_one_firmware:*:*:*:*:*:*:*:* | before 1.9.1 | Vulnerable | Satoshilabs |
| cpe:2.3:h:satoshilabs:trezor_one:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Satoshilabs |
- cpe:2.3:o:satoshilabs:trezor_model_t_firmware:*:*:*:*:*:*:*:* Versions before 2.3.1 Vulnerable ·Satoshilabs
- cpe:2.3:h:satoshilabs:trezor_model_t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Satoshilabs
- cpe:2.3:o:satoshilabs:trezor_one_firmware:*:*:*:*:*:*:*:* Versions before 1.9.1 Vulnerable ·Satoshilabs
- cpe:2.3:h:satoshilabs:trezor_one:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Satoshilabs
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-14199
- 2026-10-03 Alias added: GHSA-w7fh-c4r8-v8g4
References
Sources
- CVE-2020-14199 · CVE Program
- CVE-2020-14199 · NVD
- FIRST EPSS
- GHSA-w7fh-c4r8-v8g4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences