# CVE-2026-128031: OpenMage magento-lts before 20.18.2 Incorrect Authorization in Admin Controllers ACL

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

OpenMage magento-lts before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 contains an incorrect authorization vulnerability because admin controllers' _isAllowed() checks fall back to, or only check, parent ACL resources instead of finer per-action permissions. Authenticated restricted administrators can mass cancel or hold orders, rewrite order shipping addresses, export customer report data, or create REST roles despite their role denying those permissions.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/OpenMage/magento-lts/commit/37fa46699ea0d3c4301994dc9411b5639b2ffc2f
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/OpenMage/magento-lts/commit/b36d00df844ad127b24b481e1d4c2df90b75d559

## Affected products and versions

- OpenMage / magento-lts: ≥ 0; < 20.18.2 (affected, semver); 20.18.2 (unaffected, semver). Source: CNA: VulnCheck
- OpenMage / magento-lts: ≥ 21.0.0-beta1; < 21.0.0-beta3 (affected, semver); 21.0.0-beta3 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.1 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 3.8 (low); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 5.1 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 3.8 (low); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-863

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-wgf8-gh63-gfqf (CNA: VulnCheck; vendor-advisory)

- https://github.com/OpenMage/magento-lts/commit/37fa46699ea0d3c4301994dc9411b5639b2ffc2f (CNA: VulnCheck; patch)

- https://github.com/OpenMage/magento-lts/commit/b36d00df844ad127b24b481e1d4c2df90b75d559 (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-incorrect-authorization-in-admin-controllers-acl (CNA: VulnCheck; third-party-advisory)

- https://github.com/OpenMage/magento-lts/commit/37fa46699ea0d3c4301994dc9411b5639b2ffc2f (disclosure@vulncheck.com)

- https://github.com/OpenMage/magento-lts/commit/b36d00df844ad127b24b481e1d4c2df90b75d559 (disclosure@vulncheck.com)

- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-wgf8-gh63-gfqf (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-incorrect-authorization-in-admin-controllers-acl (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-128031; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-128031; retrieved 2026-11-13; source updated 2026-11-13

Revision: 245ac39fc41f1f4a72676f1d89232e2a41e7d3027821481a9d7273fbf8cffbc5

Canonical: https://y2.dev/cve/CVE-2026-128031

## Agent and API access

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- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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