VulnSocial

CVE-2026-117603

LOWCVSS 9.3 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Electrum before 4.7.2 contains a spending limit bypass vulnerability in the Nostr Wallet Connect plugin that allows malicious NWC clients to exceed daily_limit_sat by exploiting non-atomic budget checks and millisatoshi truncation. Attackers can send concurrent pay_invoice requests that pass budget_allows_spend() before add_to_budget() runs, or repeatedly pay msat amounts that are floored to whole satoshis, to drain funds beyond the limit.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-367

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-28: 110-28
Referenced assets1 URL
By indicator
Full discourse1 post
  • Eliran Emuna@EmunaEliran

    🚨 Electrum wallet: 2 CVEs, CVSS 4.0 9.3 (CNA) ⚠️ CVE-2026-117601: malicious server can swap your tx for a zero-fee copy paying the attacker ⚠️ CVE-2026-117603: NWC spending limit bypass ✅ Update to 4.8.3+ 🔗 https://nvd.nist.gov/vuln/detail/CVE-2026-117601 #Bitcoin #CyberSecurity https://t.co/oUGeEr28Di

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    76 followersView on X

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