Electrum: Malicious server can replace a just-broadcast tx and try to trick user into RBF-ing it
Critical vendor advisory
CVE-2026-117601
Summary
Electrum: Malicious server can replace a just-broadcast tx and try to trick user into RBF-ing it
Why it matters
GitHub has published a reviewed security advisory for electrum. Prioritize it with other application dependency updates, especially because EPSS places it in the 7% percentile.
Operator check
Check whether electrum is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.3. EPSS probability: 0.2%; percentile: 7%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.