CVE-2026-2298

Critical

Published: 23 March 2026

Published

23 March 2026

Modified

24 March 2026

KEV Added

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Patch

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CVSS Score 9.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

EPSS Score 0.0007 20.5th percentile

Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-2298 is a critical-severity Argument Injection (CWE-88) vulnerability in Salesforce Marketing Cloud (inferred from references). Its CVSS base score is 9.4 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 20.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly remediates the specific argument injection flaw in Salesforce Marketing Cloud Engagement by applying the vendor patch before January 30th, 2026.

SI-10 Information Input Validation good match

prevent

Prevents argument injection by validating and neutralizing argument delimiters in web services inputs to the Marketing Cloud Engagement system.

SI-9 Information Input Restrictions good match

prevent

Restricts web services inputs to exclude or limit argument delimiters, blocking injection attempts in Marketing Cloud Engagement.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Argument injection in public-facing Salesforce Marketing Cloud web service directly enables remote unauthenticated exploitation of the application.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') vulnerability in Salesforce Marketing Cloud Engagement allows Web Services Protocol Manipulation. This issue affects Marketing Cloud Engagement: before January 30th, 2026.

Deeper analysisAI

CVE-2026-2298 is an Improper Neutralization of Argument Delimiters in a Command, classified as Argument Injection (CWE-88), affecting Salesforce Marketing Cloud Engagement. The vulnerability enables Web Services Protocol Manipulation and impacts versions of Marketing Cloud Engagement prior to January 30th, 2026. It was published on 2026-03-23 and carries a CVSS v3.1 base score of 9.4 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L).

The vulnerability can be exploited by unauthenticated attackers over the network with low attack complexity and no user interaction required. Successful exploitation grants high-impact access to confidential data and allows significant integrity violations, such as command alteration, with a low impact on availability and no scope change.

Salesforce provides mitigation guidance in their security advisory at https://help.salesforce.com/s/articleView?id=005299346&type=1.