Is CVE-2026-21282 in the CISA KEV catalog?

No. CVE-2026-21282 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-21282?

CVE-2026-21282 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-21282?

CVE-2026-21282 has an EPSS score of 0.52% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21282?

Upgrade commerce to 2.4.4 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2026-21282

MEDIUM

5.3

CVSS v3

NVD

Description

Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by an Improper Input Validation vulnerability that could lead to application denial-of-service. An attacker could exploit this vulnerability by providing specially crafted input, causing limited impact to application availability. Exploitation of this issue does not require user interaction.

CWE-20Improper Input Validation

How to fix

Remediation Available

commerceNVD

Affected:< 2.4.4Fixed in:2.4.4CVE-2026-21282derived from NVD

commerce b2bNVD

Affected:< 1.3.3Fixed in:1.3.3CVE-2026-21282derived from NVD

magentoNVD

Affected:< 2.4.5Fixed in:2.4.5CVE-2026-21282derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

0.52%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Vendor Advisory1

helpx.adobe.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-11.