CVE-2026-100724 http4k before 6.49.0.0 Host Header Routing Bypass via reverseProxy

http4k Maven package org.http4k:http4k-core before 6.49.0.0, 5.42.0.0 and 4.51.0.0 uses substring Contains matching on the Host header by default in reverseProxy and reverseProxyRouting when dispatching to configured virtual hosts. If these functions are deployed as a public-facing inbound HTTP...

CVE-2026-100724

The http4k library (Maven package org.http4k:http4k-core) versions prior to 6.49.0.0 , 5.42.0.0 , and 4.51.0.0 are vulnerable to a Host Header Routing Bypass in the reverseProxy() and reverseProxyRouting() functions. The root cause is the use of substring (Contains) matching on the Host header wh...

EUVD-2026-87855

http4k Maven package org.http4k:http4k-core before 6.49.0.0, 5.42.0.0 and 4.51.0.0 uses substring Contains matching on the Host header by default in reverseProxy and reverseProxyRouting when dispatching to configured virtual hosts. If these functions are deployed as a public-facing inbound HTTP...

CVE-2026-100724 http4k before 6.49.0.0 Host Header Routing Bypass via reverseProxy

http4k Maven package org.http4k:http4k-core before 6.49.0.0, 5.42.0.0 and 4.51.0.0 uses substring Contains matching on the Host header by default in reverseProxy and reverseProxyRouting when dispatching to configured virtual hosts. If these functions are deployed as a public-facing inbound HTTP...

CVE-2026-100870: Weak Password Recovery Mechanism for Forgotten Password

Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 build administrator password-reset links using the request Host header without validation, allowing unauthenticated attackers to redirect reset tokens to attacker-controlled domains. Attackers can request password resets for know...

CVE-2026-101090: URL Redirection to Untrusted Site

Nezha 2.2.3 contains a Host header injection regression in the OAuth2 redirect endpoint. When the new optional dashboardhost setting is empty, /api/v1/oauth2/provider cmd/dashboard/controller/oauth2.go reflects the attacker-supplied HTTP Host header into the redirecturi sent to the identity...

CVE-2026-100862: Cleartext Storage of Sensitive Information

heym, a workflow automation platform, stores and returns multiple capability secrets in plaintext in versions prior to 0.0.91. Affected secrets include webhook header-auth values returned in cleartext by GET /api/workflows/id and persisted unsanitized into execution history, MCP API keys stored a...

CVE-2026-100837: Improper Validation of Unsafe Equivalence in Input

Contrast Edgeless Systems through 1.20.0 performs unanchored suffix matching when selecting per-registry configuration in the imagepuller. Config.registryFor strips a single trailing dot and then uses strings.HasSuffixhostname, fqdn without requiring a DNS label boundary, so a registry entry such...

CVE-2026-100724: Inconsistent Interpretation of HTTP Requests

http4k Maven package org.http4k:http4k-core before 6.49.0.0, 5.42.0.0 and 4.51.0.0 uses substring Contains matching on the Host header by default in reverseProxy and reverseProxyRouting when dispatching to configured virtual hosts. If these functions are deployed as a public-facing inbound HTTP...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in its HTTP/3 request header handling, which does not enforce the RFC 9114 section 4.3.1 requirement that an :authority pseudo-header and a literal host header field carry the same value when both are present. An...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in HttpConversionUtil.toHttp3HeadersHttpMessage, boolean, reached through Http3FrameToHttpObjectCodecfalse, which processes the Host header before the authority carried in an absolute-form request-target, so a...

CVE-2026-100700

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

CVE-2026-100664

Netty's HTTP/3 codec io.netty:netty-codec-http3 versions 4.2.2.Final through 4.2.17.Final builds the HTTP/3 :authority pseudo-header from the HTTP/1 Host header before considering the authority of an absolute-form HTTP/1 request-target. In HttpConversionUtil.toHttp3HeadersHttpMessage, boolean —...

CVE-2026-100659

Netty's HTTP/3 codec io.netty:netty-codec-http3 in versions 4.2.0.Final through 4.2.17.Final does not enforce the RFC 9114 requirement that the :authority pseudo-header field and a literal host header field, when both present, carry the same value. A remote unauthenticated peer can send a single...

CVE-2026-100664

Netty's HTTP/3 codec io.netty:netty-codec-http3 versions 4.2.2.Final through 4.2.17.Final builds the HTTP/3 :authority pseudo-header from the HTTP/1 Host header before considering the authority of an absolute-form HTTP/1 request-target. In HttpConversionUtil.toHttp3HeadersHttpMessage, boolean —...

UBUNTU-CVE-2026-100659

Netty's HTTP/3 codec io.netty:netty-codec-http3 in versions 4.2.0.Final through 4.2.17.Final does not enforce the RFC 9114 requirement that the :authority pseudo-header field and a literal host header field, when both present, carry the same value. A remote unauthenticated peer can send a single...

UBUNTU-CVE-2026-100664

Netty's HTTP/3 codec io.netty:netty-codec-http3 versions 4.2.2.Final through 4.2.17.Final builds the HTTP/3 :authority pseudo-header from the HTTP/1 Host header before considering the authority of an absolute-form HTTP/1 request-target. In HttpConversionUtil.toHttp3HeadersHttpMessage, boolean —...

CVE-2026-100700

A flaw was found in nodemailer. An inefficient regular expression within the address parser component is susceptible to excessive backtracking when evaluating untrusted input. A remote attacker can exploit this vulnerability by submitting crafted email header values containing long text sequences...

EUVD-2026-87673

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

CVE-2026-100664 Netty 4.2.2 through 4.2.17 HTTP/1 Host Header Authority Confusion

Netty's HTTP/3 codec io.netty:netty-codec-http3 versions 4.2.2.Final through 4.2.17.Final builds the HTTP/3 :authority pseudo-header from the HTTP/1 Host header before considering the authority of an absolute-form HTTP/1 request-target. In HttpConversionUtil.toHttp3HeadersHttpMessage, boolean —...