CVE-2026-34209
CVE-2026-34209
7.5
HighPublished:
Last updated:
Source:security-advisories@github.com
Analyzed
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- None
- User Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
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.
References
security-advisories@github.com
https://github.com/wevm/mppx/commit/94088246ee18f21b5d6be40d9e7a464f5a280bfbsecurity-advisories@github.com
https://github.com/wevm/mppx/releases/tag/mppx@0.4.11security-advisories@github.com
https://github.com/wevm/mppx/security/advisories/GHSA-mv9j-8jvg-j8mr