RLSA-2026:75581 Important: mod_auth_openidc security update

The modauthopenidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server. Security Fixes: modauthopenidc: modauthopenidc: Denial of Service via malformed state cookie parsi...

CVE-2023-44487-dos

CVE-2023-44487 HTTP/2 Rapid Reset このリポジトリには、影響を分析するために完全にはテストされていない例がいくつかありますが、私はこの攻撃のコンセプト（多数のストリームを開始し、すぐにRSTSTREAMフレームを送信してMAXCONCURRENTSTREAMSに到達するのを回避する）を実行したかっただけです。 私は、Single Packet Attackの悪用のために作成したH2SpaceX低レベルHTTP/2ライブラリを使用しています。...

undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF

A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without...

netty: io.netty/netty-handler-proxy: Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation

A flaw was found in Netty. The HttpProxyHandler component, which handles HTTP CONNECT requests, does not properly validate user-provided outbound headers. This allows an attacker to inject arbitrary HTTP headers into the CONNECT request sent to the proxy server. This could lead to unexpected...

netty: io.netty/netty-codec-http: Netty: HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers

A flaw was found in Netty's HttpObjectDecoder. A remote attacker can exploit this by sending a specially crafted HTTP/1.0 request that includes both Transfer-Encoding: chunked and Content-Length headers. While Netty correctly strips the conflicting Content-Length header for HTTP/1.1 messages, thi...

netty: io.netty/netty-codec-http: io.netty/netty-codec-http2: Netty: Denial of Service via unbounded memory allocation in HTTP content decompression

A flaw was found in Netty. A remote attacker can bypass the configured decompression limit in the HttpContentDecompressor by sending a specially crafted compressed payload using Brotli br, Zstandard zstd, or Snappy content encodings. This can lead to unbounded memory allocation, resulting in an...

Important: Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 7

New Red Hat Single Sign-On 7.6.13 packages are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of none. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF

A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without...

undertow: Undertow MadeYouReset HTTP/2 DDoS Vulnerability

A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts...

netty: io.netty/netty-handler-proxy: Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation

A flaw was found in Netty. The HttpProxyHandler component, which handles HTTP CONNECT requests, does not properly validate user-provided outbound headers. This allows an attacker to inject arbitrary HTTP headers into the CONNECT request sent to the proxy server. This could lead to unexpected...

netty: io.netty/netty-codec-http: Netty: HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers

A flaw was found in Netty's HttpObjectDecoder. A remote attacker can exploit this by sending a specially crafted HTTP/1.0 request that includes both Transfer-Encoding: chunked and Content-Length headers. While Netty correctly strips the conflicting Content-Length header for HTTP/1.1 messages, thi...

Important: Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 9

New Red Hat Single Sign-On 7.6.13 packages are now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of none. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

BIT-APACHE-2026-93546 Apache HTTP Server: mod_dav_fs namespace overflow

Integer overflow in moddavfs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces...

BIT-APACHE-2026-79768 Apache HTTP Server: mod_userdir information disclosure

Path equivalence: '/./' single dot directory vulnerability in Apache HTTP Server's moduserdir module when configured with absolute non-wildcard UserDir directive the 2nd form in https://httpd.apache.org/docs/2.4/mod/moduserdir.htmluserdir This issue affects Apache HTTP Server: from 2.4.0 through...

BIT-APACHE-2026-73637 Apache HTTP Server: mod_auth_digest DoS attack

Use after free in modauthdigest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifeti...

BIT-APACHE-2026-73636 Apache HTTP Server: mod_auth_digest one-time-nonce replay attack

Authentication bypass by capture-replay in modauthdigest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle MITM attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's share...

BIT-APACHE-2026-63686 Apache HTTP Server: mod_xml2enc crash on charset conversion failure

A NULL pointer dereference in modxml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails. Users are recommended to...

BIT-APACHE-2026-63292 Apache HTTP Server: mod_vhost_alias stack overflow

Stack-based buffer overflow in modvhostalias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when...

BIT-APACHE-2026-63045 Apache HTTP Server: mod_proxy_ftp PASV address handling

Improper validation of FTP PASV reply address in modproxyftp in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows, in forward proxy configurations, an untrusted FTP server to cause the proxy to open a data connection to an arbitrary third-party host via a crafte...

BIT-APACHE-2026-59797 Apache HTTP Server: mod_ssl SSLRequire allows .htaccess ap_expr file-function

Improper Privilege Management vulnerability in Apache HTTP Server's modssl via SSLRequire and file-related expressions. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68...