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Medium, CVSS 6.6amended

@account-kit/smart-contracts Allowlist Module Bypass Vulnerability

GHSA-wfm2-rq5g-f8v5

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@account-kit/smart-contracts 4.28.2), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Summary Allowlist module contains a bypass vulnerability Details The logic for using an allowlist on a Modular Account V2 contained a bug that allowed session keys to bypass any allowlist configuration Action If you are using @aa-sdk and/or @account-kit/smart-contracts between the versions of =4.8.0 and <4.28.1, please upgrade to 4.28.2

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-wfm2-rq5g-f8v5

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-wfm2-rq5g-f8v5

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-wfm2-rq5g-f8v5

Advisory: @account-kit/smart-contracts Allowlist Module Bypass Vulnerability
IDs: GHSA-wfm2-rq5g-f8v5
Record: https://patchnext.com/advisories/ghsa-wfm2-rq5g-f8v5 (revision 3, source checked 26 Oct 2026, 12:37 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @account-kit/smart-contracts 4.28.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @account-kit/smart-contracts: affected >= 4.8.0, < 4.28.2; fixed in 4.28.2

## Suggested inspection (read-only)
- `npm ls @account-kit/smart-contracts --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @account-kit/smart-contracts.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-wfm2-rq5g-f8v5 (OSV record GHSA-wfm2-rq5g-f8v5 lists affected ranges: npm @account-kit/smart-contracts >=4.8.0 <4.28.2 (fixed))
- Verified: https://github.com/advisories/GHSA-wfm2-rq5g-f8v5 (GitHub-reviewed advisory GHSA-wfm2-rq5g-f8v5 lists affected ranges: npm @account-kit/smart-contracts >=4.8.0 <4.28.2)

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