What is CVE-2026-48356?
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.
The record classifies CVE-2026-48356 under weakness class CWE-434. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 105 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.3 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - EPSS (FIRST)
- 1.0% probability of exploitation in the next 30 days, higher than 61.7% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 9.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-07-14, last modified 2026-08-27
Is CVE-2026-48356 being exploited?
Weaponised exploit code for CVE-2026-48356 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 41 in the Threadlinqs vulnerability feed.
- abraxas/CVE-2026-48356 (github)
Affected products and versions
- Adobe: Commerce, Commerce B2B, Magento Open Source, Commerce Events
How to fix CVE-2026-48356
No vendor patch reference has been recorded for CVE-2026-48356 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-48356
2 tracked threats in the Threadlinqs corpus reference CVE-2026-48356, either in the campaign’s CVE list or as an indicator on the campaign record.
- Long-running JavaScript loader campaign infects 953 online stores (mostly Magento) via PolyShell (CVE-2026-48356) and SessionReaper (CVE-2025-54236) — HIGH · 2026-10-26
- Multi-Vendor Critical Patch Roundup: Firefox 152.0.6, Chrome 150, Adobe ColdFusion/Commerce/AEM (APSB26-68/73/74), and VMware Avi Load Balancer (VMSA-2026-0005) — CRITICAL · 2026-07-16
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on .