Linux Distros Unpatched Vulnerability : CVE-2026-100664

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

CVE-2026-100664

A flaw was found in Netty's HTTP/3 codec. When converting HTTP/1 requests to HTTP/3, the codec improperly prioritizes the Host header over the request-target authority. A remote, unauthenticated attacker can exploit this authority confusion by sending a request containing conflicting destination...

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-2026-100664

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-2026-100664

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-2026-100664 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 —...

EUVD-2026-87758

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-2026-100664 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 —...

CVE-2026-100664

The Netty HTTP/3 codec (io.netty:netty-codec-http3) versions 4.2.2.Final through 4.2.17.Final is vulnerable to authority confusion . In the HttpConversionUtil.toHttp3Headers method, a non-empty Host header takes precedence over the request-target authority during HTTP/1-to-HTTP/3 conversion, viol...

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 —...

CVE-2026-77274

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, validateurlforssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL...

CVE-2026-77274 MCP Atlassian: SSRF Protection Bypass

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, validateurlforssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL...

CVE-2026-77274 MCP Atlassian: SSRF Protection Bypass

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, validateurlforssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL...

CVE-2026-77274

The mcp-atlassian MCP server (prior to version 0.22.0 ) is vulnerable to a Server-Side Request Forgery (SSRF) due to a parser mismatch in the validate_url_for_ssrf() function. The vulnerability occurs during the header-based Jira and Confluence URL authentication flow where urllib.parse.urlparse(...

EUVD-2026-84649

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, validateurlforssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL...

PT-2026-96904

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description A backslash authority confusion exists in the header-based Jira and Confluence URL authentication flow. The validate url for ssrf function interprets the authority of a URL differently than th...

CVE-2026-76172

fast-uri , a URI parser for Node.js, is vulnerable to host confusion via percent-encoded scheme normalization . The root cause is a legacy decoding pass applied to the scheme component that is never re-escaped before serialization, causing a mismatch between the parsed host (undefined) and the re...

CVE-2026-6322 fast-uri vulnerable to host confusion via percent-encoded authority delimiters

fast-uri normalize decoded percent-encoded authority delimiters inside the host component and then re-emitted them as raw delimiters during serialization. A host that combined an allowed domain, an encoded at-sign, and a different domain was re-emitted with the at-sign as a raw userinfo separator...

CVE-2026-33472 Cryptomator Hub OAuth token exchange HTTP downgrade via getAuthority() scheme confusion (CVE-2026-32303 bypass)

Cryptomator is an open-source client-side encryption application for cloud storage. Version 1.19.1 contains a logic flaw in CheckHostTrustController.getAuthority that allows an attacker to bypass the security fix for CVE-2026-32303. The method hardcodes the URI scheme based on port number, causin...

GHSA-9F29-V6MM-PW6W opa-envoy-plugin has an Authorization Bypass via Double-Slash Path Misinterpretation in input.parsed_path

A security vulnerability has been discovered in how the input.parsedpath field is constructed. HTTP request paths are treated as full URIs when parsed; interpreting leading path segments prefixed with double slashes // as authority components, and therefore dropping them from the parsed path. Thi...