HIGHCVSS v3.1 7.5Vulnerability
CVE-2026-117601
Electrum before 4.8.3 fails to verify signatures of wallet-owned inputs in unconfirmed mempool transactions, allowing malicious servers to replace a just-broadcast transaction with a conflicting one. Attackers can swallow the user's transaction and display an invalid zero-fee copy paying an attacker address, tricking users into RBF fee-bumping and signing it.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-10-27T15:29:09.616245+00:00
- Cvss severity
- HIGH
- Cvss score
- 7.5
- Retrieved at
- 2026-10-27T15:31:26+00:00
- Score
- 7.5
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-117601
- Cvss vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- First seen by Signal
- 2026-10-27T15:31:26+00:00
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published at
- 2026-10-27T14:16:39.947
- Last modified
- 2026-10-27T14:16:39.947
Related Entities (1)
HAS_WEAKNESS (1)
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