CVE-2026-34209
7.5 · HIGHOverview
CVE-2026-34209 is a high-severity vulnerability affecting wevm mppx. It was published on March 31, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from wevm. Update mppx to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| wevm | mppx | >= 0, < 0.4.11 | Affected |
Frequently Asked Questions
What is CVE-2026-34209?
CVE-2026-34209 is a high-severity vulnerability affecting wevm mppx. It was published on March 31, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-34209?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-34209?
Check the references section for vendor advisories and patches from wevm. Update mppx to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-34209?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-34209 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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