# CVE-2026-128029: OpenMage magento-lts before 20.18.2 Stored XSS via Dataflow Import Row Errors

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 a stored cross-site scripting vulnerability in the Dataflow profile run page, which inserts catalog product import row errors into the page without escaping. Unauthenticated attackers can place markup in the store, type, or attribute_set columns of an import file to run script in the session of the administrator who imports it.

## 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/d10314ddda9a6081bc27370b463b5f77c2e499de

## 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: 2.3 (low); CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 2.3 (low); CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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: 4.7 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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-79

## 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-28hq-mq6h-fh2x (CNA: VulnCheck; vendor-advisory)

- https://github.com/OpenMage/magento-lts/commit/d10314ddda9a6081bc27370b463b5f77c2e499de (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-stored-xss-via-dataflow-import-row-errors (CNA: VulnCheck; third-party-advisory)

- https://github.com/OpenMage/magento-lts/commit/d10314ddda9a6081bc27370b463b5f77c2e499de (disclosure@vulncheck.com)

- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-28hq-mq6h-fh2x (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-stored-xss-via-dataflow-import-row-errors (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-128029; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-128029; retrieved 2026-11-13; source updated 2026-11-13

Revision: 957bcbf7f0223bcd1ecf631d08b5c415488fec9fb5cf3cd77c9c694e05adf8bc

Canonical: https://y2.dev/cve/CVE-2026-128029

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

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