Common Weakness Enumeration

CWE-644

Allowed

Improper Neutralization of HTTP Headers for Scripting Syntax

Abstraction: Variant · Status: Incomplete

The product does not neutralize or incorrectly neutralizes web scripting syntax in HTTP headers that can be used by web browser components that can process raw headers, such as Flash.

115 vulnerabilities reference this CWE, most recent first.

CVE-2026-72574 (GCVE-0-2026-72574)

Vulnerability from cvelistv5 – Published: 2026-08-10 10:40 – Updated: 2026-08-10 18:22
VLAI
Title
picocms Pico - Host Header Injection Enables Script Source Hijacking
Summary
A host header injection vulnerability in picocms/Pico through 2.1.4 allows an unauthenticated remote attacker to control the origin of JavaScript and CSS assets loaded by the default theme. When base_url is unset (the default), Pico::getBaseUrl in lib/Pico.php builds the base URL from unvalidated Host, X-Forwarded-Host, X-Forwarded-Proto, and X-Forwarded-Port request headers.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 15:52 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
References
URL Tags
https://picocms.org third-party-advisory
https://github.com/picocms/Pico third-party-advisory
https://github.com/picocms/Pico/blob/master/lib/P… technical-description
Impacted products
Vendor Product Version
picocms Pico Affected: 0 , ≤ 2.1.4 (semver)
Create a notification for this product.
Date Public
2026-08-10 10:32
Show details on NVD website

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CVE-2026-67179 (GCVE-0-2026-67179)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:56 – Updated: 2026-08-17 18:18
VLAI
Title
Genkit improper host header validation
Summary
Genkit does not properly validate host request headers. Any host on the developer's network, and any website the developer visits (via DNS rebinding), can reach POST /api/runAction on the Dev UI server (default port 4000) and execute any registered Genkit action and read the result. Fixed on 2026-06-18.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · cisa-cg (v2.0.3)
Decision recorded 2026-07-28 14:54 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Impacted products
Vendor Product Version
genkit-ai genkit Affected: 0 , < 2026-06-18 (custom)
Unaffected: 2026-06-18
Create a notification for this product.
Date Public
2026-06-18 00:00
Show details on NVD website

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CVE-2026-66778 (GCVE-0-2026-66778)

Vulnerability from cvelistv5 – Published: 2026-08-11 00:19 – Updated: 2026-08-11 14:26
VLAI
Title
Multiple vulnerabilities in SAP Business AI Platform (Approuter)
Summary
SAP Approuter does not sufficiently sanitize certain request headers before forwarding traffic to internal components. An unauthenticated attacker could send a specially crafted request to obtain limited unauthorized access to information. This results in a low impact on confidentiality. There is no impact on integrity and availability.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 13:16 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
Impacted products
Vendor Product Version
SAP_SE SAP Business AI Platform (Approuter) Affected: SAP Approuter node.js package < 23.0.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-55791 (GCVE-0-2026-55791)

Vulnerability from cvelistv5 – Published: 2026-07-01 23:13 – Updated: 2026-07-02 15:54
VLAI
Title
Craft CMS: Blind SSRF and Arbitrary JavaScript Injection via Host Header Poisoning in actionResourceJs
Summary
Craft CMS is a content management system (CMS). Versions 4.0.0-RC1 and above, prior to 4.18.0 and 5.0.0-RC1, and above, prior to 5.10.0, are vulnerable to Server-Side Request Forgery (SSRF) and Arbitrary JavaScript Injection through the /actions/app/resource-js endpoint. By exploiting the default permissive trustedHosts configuration, an attacker can poison the Host or X-Forwarded-Host header to manipulate the application’s $baseUrl. This bypasses the endpoint’s internal URL validation, forcing the backend Guzzle client to fetch a malicious payload from an attacker-controlled server and reflect it to the client with a Content-Type: application/javascript header. The vulnerability manifests when assetManager.cacheSourcePaths is set to false. This issue has been fixed in versions 4.18.0 and 5.10.0.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 14:53 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
Impacted products
Vendor Product Version
craftcms cms Affected: >= 5.0.0-RC1, < 5.10.0
Affected: >= 4.0.0-RC1, < 4.18.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-54477 (GCVE-0-2026-54477)

Vulnerability from cvelistv5 – Published: 2026-07-02 23:52 – Updated: 2026-07-06 15:43
VLAI
Title
Gardyn IoT Hub Improper Neutralization of HTTP Headers for Scripting Syntax
Summary
The admin panel lacks standard security headers, enabling clickjacking and cross-site scripting attacks.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 15:43 UTC
CWE
Impacted products
Vendor Product Version
Gardyn Gardyn Home Firmware Affected: 0 , < master.627 (custom)
Create a notification for this product.
Gardyn Gardyn Studio Firmware Affected: 0 , < master.627 (custom)
Create a notification for this product.
Gardyn Gardyn Cloud API Affected: 0 , < 2.12.2026 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-48126 (GCVE-0-2026-48126)

Vulnerability from cvelistv5 – Published: 2026-05-26 16:44 – Updated: 2026-05-26 17:27
VLAI
Title
Algernon: Host header path traversal in --domain mode reads files and runs Lua from parent dir
Summary
Algernon is a small self-contained pure-Go web server. Prior to 1.17.8, when algernon is started with --domain (or --letsencrypt, which silently turns on --domain at engine/flags.go:372), the request handler resolves the served directory by joining the configured --dir with the value of the client-supplied Host header. The join is performed by filepath.Join with no validation, so a Host: .. header walks one level above the document root. Subsequent file resolution then exposes everything in that parent directory — arbitrary file read, full directory listing, and, if any .lua file is present, server-side Lua execution. This vulnerability is fixed in 1.17.8.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 17:27 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-23 - Relative Path Traversal
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
References
Impacted products
Vendor Product Version
xyproto algernon Affected: < 1.17.8
Create a notification for this product.
Show details on NVD website

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CVE-2026-48061 (GCVE-0-2026-48061)

Vulnerability from cvelistv5 – Published: 2026-08-03 20:47 – Updated: 2026-08-04 15:05
VLAI
Title
Litestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host header
Summary
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. In versions prior to 2.22.0, an attacker can bypass the allowed hosts validation by omitting the Host header and supplying an X-Forwarded-Host header set to a whitelisted domain. The AllowedHostsMiddleware trusts the X-Forwarded-Host header as a fallback when the Host header is absent. Since X-Forwarded-Host is a client-controllable header, this enables host header injection attacks such as password reset poisoning, cache poisoning, and server-side request routing manipulation. Any application using AllowedHostsConfig is affected when deployed without a reverse proxy that strips X-Forwarded-Host, or when accepting HTTP/1.0 connections. This issue has been fixed in version 2.22.0.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 13:33 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
References
Impacted products
Vendor Product Version
litestar-org litestar Affected: < 2.22.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-33805 (GCVE-0-2026-33805)

Vulnerability from cvelistv5 – Published: 2026-04-15 10:13 – Updated: 2026-07-15 01:06
VLAI
Title
@fastify/reply-from vulnerable to connection header abuse enabling stripping of proxy-added headers
Summary
@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from. Upgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-15 13:08 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Impacted products
Vendor Product Version
@fastify/reply-from @fastify/reply-from Affected: 0 , < 12.6.2 (semver)
Unaffected: 12.6.2 (semver)
Create a notification for this product.
@fastify/reply-from @fastify/http-proxy Affected: 0 , < 11.4.4 (semver)
Unaffected: 11.4.4 (semver)
Create a notification for this product.
Red Hat Red Hat OpenShift Dev Spaces 3.27 Unaffected: 1776795511 , < * (rpm)
    cpe:/a:redhat:openshift_devspaces:3.27::el9
Create a notification for this product.
Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
Create a notification for this product.
Show details on NVD website

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CVE-2026-33149 (GCVE-0-2026-33149)

Vulnerability from cvelistv5 – Published: 2026-03-26 18:53 – Updated: 2026-03-30 14:55
VLAI
Title
Tandoor Recipes Vulnerable to Host Header Injection
Summary
Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Versions up to and including 2.5.3 set ALLOWED_HOSTS = '*' by default, which causes Django to accept any value in the HTTP Host header without validation. The application uses request.build_absolute_uri() to generate absolute URLs in multiple contexts, including invite link emails, API pagination, and OpenAPI schema generation. An attacker who can send requests to the application with a crafted Host header can manipulate all server-generated absolute URLs. The most critical impact is invite link poisoning: when an admin creates an invite and the application sends the invite email, the link points to the attacker's server instead of the real application. When the victim clicks the link, the invite token is sent to the attacker, who can then use it at the real application. As of time of publication, it is unknown if a patched version is available.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-30 13:58 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
References
Impacted products
Vendor Product Version
TandoorRecipes recipes Affected: <= 2.5.3
Create a notification for this product.
Show details on NVD website

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CVE-2026-26234 (GCVE-0-2026-26234)

Vulnerability from cvelistv5 – Published: 2026-02-12 02:31 – Updated: 2026-03-05 01:31
VLAI
Title
JUNG Smart Visu Server - Improper Neutralization of HTTP Headers for Scripting Syntax
Summary
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 phishing, and redirecting users to malicious domains.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-12 15:31 UTC
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
References
Impacted products
Vendor Product Version
ALBRECHT JUNG GMBH & CO. KG JUNG Smart Visu Server Affected: 1.1.1050
Affected: 1.0.905
Affected: 1.0.832
Affected: 1.0.830
    cpe:2.3:o:jung-group:smart_visu_server_firmware:1.1.1050:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-02-12 00:00
Show details on NVD website

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      "title": "JUNG Smart Visu Server - Improper Neutralization of HTTP Headers for Scripting Syntax",
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        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-26234",
    "datePublished": "2026-02-12T02:31:11.882Z",
    "dateReserved": "2026-02-12T01:23:58.228Z",
    "dateUpdated": "2026-03-05T01:31:03.341Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Mitigation
Architecture and Design

Perform output validation in order to filter/escape/encode unsafe data that is being passed from the server in an HTTP response header.

Mitigation
Architecture and Design

Disable script execution functionality in the clients' browser.

No CAPEC attack patterns related to this CWE.