Security Advisory

CVE-2026-34209

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-31 14:10:46

Last updated 2026-04-02 15:13:32

Assigner GitHub_M

State PUBLISHED

Description

mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the tempo/session cooperative close handler validated the close voucher amount using "<" instead of "<=" against the on-chain settled amount. An attacker could submit a close voucher exactly equal to the settled amount, which would be accepted without committing any new funds, effectively closing or griefing the channel for free. This issue has been patched in version 0.4.11.

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