CVE-2026-26149
Published: 14 April 2026
Summary
CVE-2026-26149 is a critical-severity Improper Neutralization of Escape, Meta, or Control Sequences (CWE-150) vulnerability in Microsoft Power Apps. Its CVSS base score is 9.0 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Impersonation (T1684.001); ranked at the 42.4th 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-15 (Information Output Filtering).
Deeper analysis
CVE-2026-26149 is a vulnerability in Microsoft Power Apps stemming from improper neutralization of escape, meta, or control sequences. Published on 2026-04-14, it enables an authorized attacker to perform spoofing over a network and is associated with CWE-150. The issue carries a CVSS v3.1 base score of 9.0 (AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H), classifying it as critical due to its potential for high-impact effects across confidentiality, integrity, and availability.
Exploitation requires an attacker with low privileges, such as an authenticated user, to target victims over the network with low complexity, though user interaction is necessary. Upon success, the attack changes scope and allows spoofing, leading to high confidentiality, integrity, and availability impacts as scored by CVSS.
The Microsoft Security Response Center advisory provides details on mitigation at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26149.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-22371
Vulnerability details
Improper neutralization of escape, meta, or control sequences in Microsoft Power Apps allows an authorized attacker to perform spoofing over a network.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables network spoofing via escape sequence injection in Power Apps (CWE-150), directly facilitating impersonation of users/content (T1656) and adversary-in-the-middle style deception (T1557) with scope change and high CIA impact.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of inputs to neutralize escape, meta, or control sequences that enable spoofing attacks in Power Apps.
Filters information outputs to prevent rendering of harmful escape sequences leading to network-based spoofing.
Ensures timely remediation of the specific flaw in improper neutralization of control sequences in Microsoft Power Apps.