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.

107 vulnerabilities reference this CWE, most recent first.

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 (v2.0.3)
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')
Assigner
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 (v2.0.3)
CWE
Assigner
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.
Credits
Michael Groberman reported this vulnerability to CISA.
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 (v2.0.3)
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
Assigner
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 (v2.0.3)
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
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 (v2.0.3)
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
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.
Credits
FredKSchott mcollina UlisesGascon climba03003
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 (v2.0.3)
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
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 (v2.0.3)
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
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
Create a notification for this product.
Date Public
2026-02-12 00:00
Credits
LiquidWorm as Gjoko Krstic of Zero Science Lab
Show details on NVD website

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CVE-2026-21762 (GCVE-0-2026-21762)

Vulnerability from cvelistv5 – Published: 2026-07-17 17:10 – Updated: 2026-07-17 17:53
VLAI
Title
Missing HTTP Security Headers in DevOps Loop
Summary
HCL DevOps Loop is affected by missing HTTP security headers. Missing security headers may reduce browser protections against common web-based attacks such as clickjacking, MIME-type sniffing, and cross-site scripting.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
HCL
References
Impacted products
Show details on NVD website

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CVE-2026-10836 (GCVE-0-2026-10836)

Vulnerability from cvelistv5 – Published: 2026-06-17 11:10 – Updated: 2026-06-17 14:58
VLAI
Title
Improper neutralization of HTTP headers in Password Manager
Summary
Improper handling of HTTP headers that allows a remote attacker to manipulate the value of the Host header using specially crafted requests. A successful exploit could result in the generation of manipulated links or responses, potentially leading to limited information disclosure or compromising the integrity of dependent services.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-644 - Improper neutralization of HTTP headers for scripting syntax
Assigner
References
Impacted products
Vendor Product Version
Password Manager Password Manager Affected: 0 , < 08/07/2025 (date)
Unaffected: 08/07/2025 (date)
Create a notification for this product.
Date Public
2026-06-17 10:00
Show details on NVD website

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CVE-2026-4096 (GCVE-0-2026-4096)

Vulnerability from cvelistv5 – Published: 2026-06-11 14:44 – Updated: 2026-06-11 16:52
VLAI
Title
A vulnerability has been identified in IBM DevOps Plan that allows a Host Header Injection attack due to improper handling of the Host header in HTTP requests.
Summary
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SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Assigner
ibm
References
URL Tags
https://www.ibm.com/support/pages/node/7275005 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM DevOps Plan Affected: 3.0.0 , ≤ 3.0.6 (semver)
    cpe:2.3:a:ibm:devops_plan:3.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:devops_plan:3.0.6:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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    "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
    "assignerShortName": "ibm",
    "cveId": "CVE-2026-4096",
    "datePublished": "2026-06-11T14:44:47.680Z",
    "dateReserved": "2026-03-12T23:16:12.318Z",
    "dateUpdated": "2026-06-11T16:52:52.339Z",
    "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.