CVE-2026-104891: CWE-290: Authentication Bypass by Spoofing in douglasborthwick-crypto mppx-condition-gate
Description
mppx-condition-gate provides conditional free-access wrappers for mppx payment methods. Prior to @insumermodel/mppx-condition-gate 3.0.0 and @insumermodel/mppx-token-gate 1.0.4, the packages read a wallet address from the client-supplied credential.source, checked whether that public address met configured on-chain conditions, and returned a successful free-access receipt without invoking the wrapped payment verifier or proving that the caller controlled the wallet. An unauthenticated attacker could name any qualifying wallet and obtain content that should require payment, and cached grants could be reused for the configured cache lifetime. The corrected packages prevent free-access authorization unless payer control has been established. These issues are fixed in @insumermodel/mppx-condition-gate 3.0.0 and @insumermodel/mppx-token-gate 1.0.4.
CVSS v3.1
Score 7.5high
Affected software
douglasborthwick-crypto
mppx-condition-gate
@insumermodel
mppx-condition-gate
@insumermodel
mppx-token-gate
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in mppx-condition-gate and mppx-token-gate arises because the packages read a wallet address from the client-supplied credential.source and checked only whether the address met configured on-chain conditions. They did not verify that the caller controlled the wallet, allowing attackers to spoof any qualifying wallet address and obtain unauthorized free access. Cached grants could also be reused during the cache lifetime. The fix in versions 3.0.0 (mppx-condition-gate) and 1.0.4 (mppx-token-gate) enforces verification of payer control before granting free-access authorization.
Potential Impact
An unauthenticated attacker can bypass authentication by spoofing wallet addresses, gaining unauthorized free access to content that should require payment. This results in a confidentiality breach as protected content can be accessed without proper authorization. There is no indication of integrity or availability impact. Cached access grants could be reused, potentially extending unauthorized access duration.
Mitigation Recommendations
Upgrade to @insumermodel/mppx-condition-gate version 3.0.0 or later and @insumermodel/mppx-token-gate version 1.0.4 or later to apply the official fix that enforces verification of wallet control before granting free access. No other mitigation is required as the issue is resolved in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-02T14:59:11.775Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac3caa02cdf04f65616ed0b
Added to database: 10/05/2026, 16:04:48 UTC
Last enriched: 10/05/2026, 16:18:17 UTC
Last updated: 10/05/2026, 20:34:04 UTC
Views: 12
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