GHSA-8x4m-qw58-3pcx

Source

https://github.com/advisories/GHSA-8x4m-qw58-3pcx

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-8x4m-qw58-3pcx/GHSA-8x4m-qw58-3pcx.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-8x4m-qw58-3pcx

Published

2026-03-29T15:15:36Z

Modified

2026-03-29T15:35:52Z

Severity

9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N CVSS Calculator

Summary

mppx has multiple payment bypass and griefing vulnerabilities

Details

Impact

Multiple vulnerabilities were discovered in tempo/charge and tempo/session which allowed for undesirable behaviors, including:

Replaying tempo/charge transaction hashes across push/pull modes, across charge/session endpoints, and via concurrent requests
Performing free tempo/charge requests due to missing transfer log verification in pull-mode
Replaying tempo/charge credentials across routes via cross-route scope confusion (memo/splits not included in scope binding)
Manipulating the fee payer of a tempo/charge handler into paying for requests (missing sender signature before co-signing)
Bypassing tempo/session voucher signature verification
Piggybacking off existing tempo/session channels via settle voucher reuse and weak channel ID binding
Performing free tempo/session requests by exploiting channel reopen without on-chain settled state
Accepting deductions on finalized tempo/session channels
Bypassing payment on free routes via method-mismatch fallback
Griefing tempo/session channels via force-close detection bypass (closeRequestedAt not persisted)

Patches

Fixed in 0.4.8.

Workarounds

There are no workarounds available for these vulnerabilities.

Database specific

{
    "cwe_ids":  [
        "CWE-288",
        "CWE-294",
        "CWE-345"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-03-29T15:15:36Z",
    "nvd_published_at":  null,
    "severity":  "CRITICAL"
}

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

0 Unknown introduced version / All previous versions are affected

Fixed

0.4.8

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-8x4m-qw58-3pcx/GHSA-8x4m-qw58-3pcx.json"