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Header-Injection

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high threat

Heimdall Proxy Forwarded Header Injection via Unsanitized Host Header

Attackers can exploit Heimdall proxy versions <= 0.17.16 operating in proxy mode by injecting malicious values into the `Host` HTTP header, leading to the construction of a manipulated `Forwarded` header that can spoof client IP addresses for upstream services, potentially bypassing IP-based access controls.

exploited Heimdall header-injection proxy access-control-bypass ip-spoofing vulnerability web
1r 1t
high advisory

OpenShift Router Vulnerability CVE-2026-46579: Mutual TLS Bypass via Header Injection

CVE-2026-46579 describes a vulnerability in the Red Hat OpenShift Router. When a Route is configured with `insecureEdgeTerminationPolicy` set to Allow, the HTTP frontend fails to remove `X-SSL-Client-*` headers from incoming requests, allowing unauthenticated attackers to bypass mutual TLS authentication and impersonate client certificate identities.

OpenShift Router openshift mtls header-injection cve-2026-46579
1r 2t 1c
medium threat

cPanel cPanel/WHM Vulnerability Allows Header Manipulation

A remote, anonymous attacker can exploit a vulnerability in cPanel cPanel/WHM to perform an HTTP response header injection, enabling cross-site scripting (XSS), open redirect attacks, and cache or header manipulation.

cPanel/WHM cpanel header-injection xss open-redirect
2r 1t
critical advisory

SillyTavern Authentication Bypass via HTTP Header Injection (CVE-2026-44649)

SillyTavern versions 1.17.0 and earlier are vulnerable to an authentication bypass (CVE-2026-44649) via HTTP header injection, where the application accepts Remote-User and X-Authentik-Username headers for SSO without proper validation, allowing attackers to impersonate any user, including administrators, if SSO is enabled.

sillytavern authentication-bypass header-injection account-takeover cve-2026-44649
2r 1t
high advisory

Plunk Email Platform CRLF Header Injection Vulnerability

A CRLF header injection vulnerability in Plunk versions prior to 0.8.0 allows authenticated API users to inject arbitrary email headers, enabling silent email forwarding, reply redirection, or sender spoofing.

crlf header-injection plunk cve-2026-34975 cloud
2r 1t 1c
high advisory

OpenClaw Improper Header Validation Leads to Credential Leakage

OpenClaw before 2026.3.7 is vulnerable to improper header validation in fetchWithSsrFGuard, allowing attackers to intercept sensitive authorization headers via cross-origin redirects.

cve-2026-32913 credential-access header-injection openclaw
2r 1t
high advisory

Kiota RedirectHandler Leaks Sensitive Headers on Cross-Origin Redirects

The RedirectHandler middleware in multiple Kiota libraries fails to strip sensitive HTTP headers (Cookie, Proxy-Authorization, and custom headers) when following 3xx redirects to a different host or scheme, potentially leading to session hijacking, corporate proxy credential theft, and API key theft.

kiota-java +8 header-injection credential-access cloud
3r 1t
high advisory

Axios HTTP Adapter Prototype Pollution Vulnerability

A prototype pollution vulnerability in the Axios HTTP adapter allows an attacker to inject arbitrary HTTP headers into outgoing requests by polluting the Object prototype with specific properties, leading to potential authentication bypass and privilege escalation.

axios +1 prototype-pollution header-injection cve-2026-42035 authentication-bypass privilege-escalation
2r 4t 1c