GHSA-mv9j-8jvg-j8mr

Source

https://github.com/advisories/GHSA-mv9j-8jvg-j8mr

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mv9j-8jvg-j8mr/GHSA-mv9j-8jvg-j8mr.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-mv9j-8jvg-j8mr

Aliases

CVE-2026-34209

Published

2026-03-29T15:10:03Z

Modified

2026-03-31T19:05:19.688464Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator

Summary

mppx: Tempo has a session close voucher bypass vulnerability due to settled amount equality

Details

Impact

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.

Patches

Fixed in 0.4.11.

Workarounds

There are no workarounds available for this vulnerability.

Database specific

{
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-294"
    ],
    "nvd_published_at": "2026-03-31T15:16:18Z",
    "github_reviewed_at": "2026-03-29T15:10:03Z",
    "severity": "HIGH"
}

References

Affected packages

npm / mppx

Package

Name: mppx; View open source insights on deps.dev
Purl: pkg:npm/mppx

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.4.11

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mv9j-8jvg-j8mr/GHSA-mv9j-8jvg-j8mr.json"