CVE-2026-34209

HIGH

7.5

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.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/31/2026

Derniere modification4/3/2026

Sourcenvd

Observations honeypot0

Produits affectes

wevm:mppx

Faiblesses (CWE)

CWE-294

References

https://github.com/wevm/mppx/commit/94088246ee18f21b5d6be40d9e7a464f5a280bfb(security-advisories@github.com)

https://github.com/wevm/mppx/releases/tag/mppx@0.4.11(security-advisories@github.com)

https://github.com/wevm/mppx/security/advisories/GHSA-mv9j-8jvg-j8mr(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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