Vulnerability · Published Oct 5, 2026 · Assigned by GitHub_M
CVE-2026-104891mppx-condition-gate: Free-access path grants on a self-declared wallet without proving control
High 7.5
In plain English
A high-severity authentication bypass by spoofing in mppx-condition-gate from douglasborthwick-crypto. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @insumermodel/mppx-condition-gate | 3.0.0 | GHSA-jg6q-3qfh-r9f8 |
| npm | @insumermodel/mppx-token-gate | 1.0.4 | GHSA-jg6q-3qfh-r9f8 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| douglasborthwick-crypto | mppx-condition-gate | < b1d9935a57ba6d32da49eead1bfb459ad0cd55ab |
| @insumermodel | mppx-condition-gate | < 3.0.0 |
| @insumermodel | mppx-token-gate | < 1.0.4 |
Weakness: CWE-290, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/insumerapi/mppx-condition-gate/security/advisories/GHSA-jg6q-3qfh-r9f8 x_refsource_CONFIRM
- https://github.com/insumerapi/mppx-condition-gate/commit/b1d9935a57ba6d32da49eead1bfb459ad0cd55ab x_refsource_MISC
- https://github.com/insumerapi/mppx-condition-gate/commit/ec43a2fcd443a0fa102b6d4203abed2b785bd954 x_refsource_MISC