CVE-2026-48356
Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability
Adobe Commerce and Magento
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 27 October 2026. US federal agencies were required to remediate it by 10 November 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 47.5%, which is higher than 98.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Frequently asked questions
Is CVE-2026-48356 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-48356.
What does CVE-2026-48356 affect?
CVE-2026-48356 affects Adobe Commerce and Magento. 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.
How severe is CVE-2026-48356?
CVE-2026-48356 is rated CRITICAL with a CVSS base score of 9.3. EPSS puts the probability of exploitation in the next 30 days at 47.5%, higher than 98.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 10 November 2026.
How should organisations respond to CVE-2026-48356?
Apply the vendor patch for Adobe Commerce and Magento as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.