CVE-2026-48356
Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 November 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.3 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- EPSS
- 44.58% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 27 October 2026 · due 10 November 2026
- Weakness
- CWE-434
- Affected
- adobe/commerce · adobe/commerce b2b · adobe/magento · adobe/i\/o events
- Source
- psirt@adobe.com
EPSS moved from 30.6% on 27 October 2026 to 44.6% on 29 October 2026, peaking at 59.1% on 28 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
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. https://www.adobe.com/trust/security/products/commerce/apsb26-73.html ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-48356
References
- https://helpx.adobe.com/security/products/magento/apsb26-73.htmlVendor Advisory
- https://sansec.io/research/magento-cms-block-loader-deepveindrilling#indicators-of-compromiseThird Party Advisory
- https://sansec.io/research/polyshell-mass-attack-waveThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48356US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.