CVE-2026-44767: CWE-79: Improper Neutralization of Input During Web Page Generation in SAP_SE @ui5/webcomponents-base
setThemeRoot() failed to enforce the sap-allowed-theme-origins allowlist. An attacker-controlled absolute cross-origin URL could be stored and used directly to construct a <link rel=stylesheet> element, even when no <meta name=sap-allowed-theme-origins> tag was present in the document. The same bypass was reachable via the ?sap-themeRoot URL parameter.Exploitation requires attacker-influenced input (e.g., a URL query parameter, tenant configuration, or user-supplied setting) to reach setThemeRoot(). A successful exploit allows an attacker to inject arbitrary CSS into the victim page, enabling:- UI redressing and clickjacking- Phishing overlays- Visual defacement- Limited data exfiltration via CSS attribute selectors targeting predictable DOM content
AI Analysis
Technical Summary
The vulnerability in SAP_SE's @ui5/webcomponents-base arises from setThemeRoot() not properly enforcing the sap-allowed-theme-origins allowlist. An attacker can supply an absolute cross-origin URL that is stored and used directly to create a <link rel=stylesheet> element, bypassing intended restrictions. This bypass is also reachable via the ?sap-themeRoot URL parameter. Exploitation requires attacker-controlled input to invoke setThemeRoot(). The injected CSS can be used for UI redressing, clickjacking, phishing overlays, visual defacement, and limited data exfiltration through CSS attribute selectors targeting predictable DOM content.
Potential Impact
An attacker who can influence input to setThemeRoot() can inject arbitrary CSS into the victim's page. This can enable UI redressing and clickjacking attacks, phishing overlays to deceive users, visual defacement of the interface, and limited data exfiltration by leveraging CSS attribute selectors. The confidentiality and integrity of the user interface can be compromised, but there is no direct impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a fix is available, avoid exposing attacker-controllable inputs to setThemeRoot() and restrict usage of the ?sap-themeRoot URL parameter where possible.
CVE-2026-44767: CWE-79: Improper Neutralization of Input During Web Page Generation in SAP_SE @ui5/webcomponents-base
Description
setThemeRoot() failed to enforce the sap-allowed-theme-origins allowlist. An attacker-controlled absolute cross-origin URL could be stored and used directly to construct a <link rel=stylesheet> element, even when no <meta name=sap-allowed-theme-origins> tag was present in the document. The same bypass was reachable via the ?sap-themeRoot URL parameter.Exploitation requires attacker-influenced input (e.g., a URL query parameter, tenant configuration, or user-supplied setting) to reach setThemeRoot(). A successful exploit allows an attacker to inject arbitrary CSS into the victim page, enabling:- UI redressing and clickjacking- Phishing overlays- Visual defacement- Limited data exfiltration via CSS attribute selectors targeting predictable DOM content
CVSS v3.1
Score 6.1medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in SAP_SE's @ui5/webcomponents-base arises from setThemeRoot() not properly enforcing the sap-allowed-theme-origins allowlist. An attacker can supply an absolute cross-origin URL that is stored and used directly to create a <link rel=stylesheet> element, bypassing intended restrictions. This bypass is also reachable via the ?sap-themeRoot URL parameter. Exploitation requires attacker-controlled input to invoke setThemeRoot(). The injected CSS can be used for UI redressing, clickjacking, phishing overlays, visual defacement, and limited data exfiltration through CSS attribute selectors targeting predictable DOM content.
Potential Impact
An attacker who can influence input to setThemeRoot() can inject arbitrary CSS into the victim's page. This can enable UI redressing and clickjacking attacks, phishing overlays to deceive users, visual defacement of the interface, and limited data exfiltration by leveraging CSS attribute selectors. The confidentiality and integrity of the user interface can be compromised, but there is no direct impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a fix is available, avoid exposing attacker-controllable inputs to setThemeRoot() and restrict usage of the ?sap-themeRoot URL parameter where possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- sap
- Date Reserved
- 2026-05-07T18:39:44.147Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a558ad968715ace4361842c
Added to database: 07/14/2026, 01:03:21 UTC
Last enriched: 07/14/2026, 01:18:52 UTC
Last updated: 08/26/2026, 10:52:09 UTC
Views: 56
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