CVE-2026-48356: Adobe Commerce is affected by an Unrestricted Upload of File with Dangerous Type vulnerability that could resu

This month

CRITICAL 9.3DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2026-48356 is a critical-severity flaw (CVSS 9.3) affecting commerce, commerce b2b, magento. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-434
Published	2026-07-14
Last modified	2026-08-28

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

Last updated 2026-08-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-14 20:17 UTCPublished CVE record published
2026-08-28 00:17 UTCUpdated Record last modified

adobe commerce DOWNGRADE

Affected: 2.4.4 · 2.4.4 p1 · 2.4.4 p10 · 2.4.4 p11 · 2.4.4 p12 · 2.4.4 p13 · 2.4.4 p14 · 2.4.4 p15

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.4

1. Check installed version

apt-cache policy commerce || rpm -q commerce || commerce --version

2. No fixed release: DOWNGRADE to a release before 2.4.4 (Debian / Ubuntu)

apt-cache madison commerce sudo apt install commerce=<VERSION_BEFORE_2.4.4> sudo apt-mark hold commerce

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list commerce sudo dnf downgrade commerce-<VERSION_BEFORE_2.4.4> sudo dnf versionlock add commerce

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

adobe commerce b2b DOWNGRADE

Affected: 1.3.3 · 1.3.3 p1 · 1.3.3 p10 · 1.3.3 p11 · 1.3.3 p12 · 1.3.3 p13 · 1.3.3 p14 · 1.3.3 p15

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.3

1. Check installed version

apt-cache policy commerce-b2b || rpm -q commerce-b2b || commerce-b2b --version

2. No fixed release: DOWNGRADE to a release before 1.3.3 (Debian / Ubuntu)

apt-cache madison commerce-b2b sudo apt install commerce-b2b=<VERSION_BEFORE_1.3.3> sudo apt-mark hold commerce-b2b

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list commerce-b2b sudo dnf downgrade commerce-b2b-<VERSION_BEFORE_1.3.3> sudo dnf versionlock add commerce-b2b

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

adobe magento DOWNGRADE

Affected: 2.4.6 · 2.4.6 p1 · 2.4.6 p10 · 2.4.6 p11 · 2.4.6 p12 · 2.4.6 p13 · 2.4.6 p14 · 2.4.6 p15

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.6

1. Check installed version

apt-cache policy magento || rpm -q magento || magento --version

2. No fixed release: DOWNGRADE to a release before 2.4.6 (Debian / Ubuntu)

apt-cache madison magento sudo apt install magento=<VERSION_BEFORE_2.4.6> sudo apt-mark hold magento

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list magento sudo dnf downgrade magento-<VERSION_BEFORE_2.4.6> sudo dnf versionlock add magento

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

adobe i\/o events UPGRADE

Affected: >= 1.6.0 and < 1.21.0

Fixed in: 1.21.0

Safe to downgrade to: a release before 1.6.0

1. Check installed version

apt-cache policy io-events || rpm -q io-events || io-events --version

2. UPGRADE to 1.21.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade io-events

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade io-events

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.6.0 (Debian / Ubuntu)

apt-cache madison io-events sudo apt install io-events=<VERSION_BEFORE_1.6.0> sudo apt-mark hold io-events

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list io-events sudo dnf downgrade io-events-<VERSION_BEFORE_1.6.0> sudo dnf versionlock add io-events

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-48356?

commerce: downgrade or apply the listed mitigation; commerce b2b: downgrade or apply the listed mitigation; magento: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-48356 being exploited?

CVE-2026-48356 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-48356 affect?

CVE-2026-48356 affects commerce, commerce b2b, magento. Severity is critical (CVSS 9.3). 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'

How urgent is CVE-2026-48356?

Priority 48/100. Critical severity

Software pages

Magento vulnerabilities

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References

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