CVE-2026-48356: Adobe Commerce and Magento

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

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.

CISA’s summary

Adobe Commerce and Magento contain 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.

Weakness type: CWE-434.

Product: Adobe Commerce and Magento · Assigned by: adobe · Published: 2026-07-14

Affected and fixed versions

Vendor	Product	Affected versions (per 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 scores

Scored by	CVSS	Score	Vector
adobe	3.1	9.3 Critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`

Attack vector: network (remotely reachable)
Attack complexity: low
Privileges required: none (no login)
User interaction: required (a user must click/open something)
Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

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 2026-11-04): 47.47% probability of exploitation activity in the next 30 days; percentile 99.

Timeline

2026-07-14 — CVE record published by adobe
2026-08-27 — CVE record last updated
2026-10-24 — erroneo.us brief: Magento CMS Block Loader Campaign Hits 953 Stores
2026-10-27 — Added to CISA’s Known Exploited Vulnerabilities catalog
2026-11-10 — CISA remediation deadline for US federal agencies

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.