CVE-2026-117603
Description
A flaw was found in the Nostr Wallet Connect (NWC) plugin for Electrum. Due to race conditions in budget validation and improper rounding of fractional payment units, an attacker connected to the wallet can bypass configured daily spending limits. By sending concurrent payment requests or repeatedly submitting fractional payment amounts, a malicious client can deplete wallet balances beyond authorized thresholds.
Statement
This vulnerability is evaluated as Critical because remote attackers can completely bypass intended daily spending thresholds to deplete wallet balances without requiring privileged authorization. However, Red Hat Enterprise Linux and the broader Red Hat product portfolio do not distribute or support the Electrum client or its plugins. Consequently, standard Red Hat enterprise deployments and supported software stacks are unaffected by this security flaw.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Integrity,Other
Technical Impact: Alter Execution Logic; Unexpected State
The attacker can gain access to otherwise unauthorized resources.
Integrity,Other
Technical Impact: Modify Application Data; Modify Files or Directories; Modify Memory; Other
Race conditions such as this kind may be employed to gain read or write access to resources which are not normally readable or writable by the user in question.
Integrity,Other
Technical Impact: Other
The resource in question, or other resources (through the corrupted one), may be changed in undesirable ways by a malicious user.
Non-Repudiation
Technical Impact: Hide Activities
If a file or other resource is written in this method, as opposed to in a valid way, logging of the activity may not occur.
Non-Repudiation,Other
Technical Impact: Other
In some cases it may be possible to delete files a malicious user might not otherwise have access to, such as log files.
Other
Technical Impact: Unexpected State
The product may perform invalid actions when the resource is in an unexpected state.
Frequently Asked Questions
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