CVE-2026-104891 mppx-condition-gate: Free-access path grants on a self-declared wallet without proving control
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-104891?
CVE-2026-104891 is a high-severity vulnerability in @insumermodel mppx-condition-gate, published on 5 Oct 2026.
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.
Which versions are affected by CVE-2026-104891?
4 open source packages ship an affected version, including @insumermodel/mppx-condition-gate and @insumermodel/mppx-token-gate.
| Package | Affected | Fixed in |
|---|---|---|
@insumermodel/mppx-condition-gate npm | All versions | 3.0.0 |
@insumermodel/mppx-condition-gate npm | All versions | 3.0.0 |
@insumermodel/mppx-token-gate npm | All versions | 1.0.4 |
@insumermodel/mppx-token-gate npm | All versions | 1.0.4 |
How do I fix CVE-2026-104891?
Upgrade @insumermodel/mppx-condition-gate to 3.0.0 or later.
Is CVE-2026-104891 being exploited?
There is no known exploitation of CVE-2026-104891 in the wild and no public exploit code.
Sources
Also known as GHSA-jg6q-3qfh-r9f8.