CVE-2026-26234
Jung-Group Smart Visu Server Firmware 1.0.830 – 1.1.1050
Raw vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XSummary
CVE-2026-26234 is a high-severity Improper Neutralization of HTTP Headers for Scripting Syntax (CWE-644) vulnerability in Jung-Group Smart Visu Server Firmware. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Content Injection (T1659); ranked at the 40th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-26234 affects JUNG Smart Visu Server version 1.1.1050 and involves a request header manipulation vulnerability. The flaw enables unauthenticated attackers to override request URLs by injecting arbitrary values into the X-Forwarded-Host header. This improper neutralization of HTTP headers for scripting syntax, mapped to CWE-644, carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) and was published on 2026-02-12.
Unauthenticated attackers can exploit this vulnerability remotely with low complexity and no required privileges, though it necessitates user interaction. By manipulating proxied requests, they generate tainted responses that enable cache poisoning, potential phishing attacks, and redirection of users to malicious domains, resulting in high impacts to confidentiality, integrity, and availability.
Advisories from VulnCheck (https://www.vulncheck.com/advisories/jung-smart-visu-server-improper-neutralization-of-http-headers-for-scripting-syntax) and Zero Science (https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5970.php) provide additional details on the vulnerability.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-7028
Vulnerability Data
JUNG Smart Visu Server 1.1.1050 contains a request header manipulation vulnerability that allows unauthenticated attackers to override request URLs by injecting arbitrary values in the X-Forwarded-Host header. Attackers can manipulate proxied requests to generate tainted responses, enabling cache poisoning, potential…
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phishing, and redirecting users to malicious domains.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V4.2.3
Mitigating Controls (NIST 800-53 r5) AI
Input validation directly requires checking/neutralizing untrusted data such as HTTP headers before they reach browser components.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require proper output encoding and header sanitization to prevent scripting injection.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing catches header-injection issues before release, covering most of the weakness.
Secure development lifecycle mandates input validation and output encoding that directly prevents header-injection flaws.
Application security requirements explicitly call for neutralizing untrusted data in HTTP headers.
Secure architecture principles reduce injection surfaces but do not prescribe header-specific controls.
Secure coding standards require proper escaping or rejection of scripting syntax in HTTP headers.