---
title: "CVE-2026-48356: Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-48356/
description: "CVE-2026-48356 (Adobe Commerce and Magento): Exploited in the wild (CISA KEV). Adobe Commerce is affected by an Unrestricted Upload of File with Dangerous…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-07-14
date_modified: 2026-10-27
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-48356"
kev: true
cvss: 9.3
epss: 0.47472
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-48356: Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Adobe Commerce and Magento. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-10-27, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-11-10 ; treat that as the outer limit, not the target.
- EPSS 47.5% , percentile 99: FIRST’s model estimates a 47.5% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Editorial verdict: Check exposure. Magento CMS Block Loader Campaign Hits 953 Stores — If you run Magento or Adobe Commerce, search your CMS blocks for this loader today; a store missing PolyShell or SessionReaper fixes should be treated as compromised, and a patched store is not automatically clean.

## What it is

Adobe Commerce is affected by an Unrestricted Upload of File with Dangerous Type vulnerability that could result in arbitrary code execution in the context of the current user, potentially gaining elevated access or control over the victim's account or session. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed.

## Affected products (CVE record)

- Adobe Adobe Commerce: <= 2.4.9, 2.4.8-p5, 2.4.7-p10, 2.4.6-p15, 2.4.5-p17, 2.4.4-p18
- Adobe Adobe Commerce B2B: <= 1.5.3, 1.5.2-p5, 1.4.2-p10, 1.3.4-p17, 1.3.3-p18
- Adobe Magento Open Source: <= 2.4.9, 2.4.8-p5, 2.4.7-p10, 2.4.6-p15
- Adobe Adobe Commerce Events: <= 1.20.0

## Severity

- adobe CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`

## Exploitation

- CISA KEV: added 2026-10-27; federal due date 2026-11-10. Known ransomware use: Unknown.
- CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-11-05): 47.47% probability of exploitation activity in the next 30 days; percentile 99.

## Sources

- [helpx.adobe.com](https://helpx.adobe.com/security/products/magento/apsb26-73.html)
- [Listed in CISA KEV notes (adobe.com)](https://www.adobe.com/trust/security/products/commerce/apsb26-73.html)
- [CVE.org record CVE-2026-48356](https://www.cve.org/CVERecord?id=CVE-2026-48356)
- [NVD entry CVE-2026-48356](https://nvd.nist.gov/vuln/detail/CVE-2026-48356)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48356)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)

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Source page: https://erroneo.us/security/cve/CVE-2026-48356/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt