CVE-2026-42584 Netty: HttpClientCodec response desynchronization

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103,...

CVE-2026-42582

Netty (HTTP/3) vulnerable in QpackDecoder.decodeHuffmanEncodedLiteral prior to 4.2.13.Final: the non-Huffman path may allocate byte[length] without verifying length

CVE-2026-42582 Netty: HTTP/3 QPACK literal unbounded allocation

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final, when decoding header blocks, the non-Huffman branch of io.netty.handler.codec.http3.QpackDecoderdecodeHuffmanEncodedLiteral may execute new bytelength for a string literal before verifying that length byt...

CVE-2026-42580

Netty vulnerability CVE-2026-42580: The chunk size parser in Netty before 4.2.13.Final and 4.1.133.Final silently overflows an int, enabling HTTP request smuggling. Affected: Netty versions prior to the fixed releases. Impact: potential request smuggling with LOW to MEDIUM described CVSS factors ...

CVE-2026-42578 Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's HttpProxyHandler constructs HTTP CONNECT requests with header validation explicitly disabled. The newInitialMessage method creates headers using...

CVE-2026-42578

Netty CVE-2026-42578 affects HttpProxyHandler prior to 4.2.13.Final and 4.1.133.Final. The issue arises because HttpProxyHandler builds CONNECT requests with header validation disabled (newInitialMessage uses DefaultHttpHeadersFactory.headersFactory().withValidation(false) and then appends user-p...

CVE-2026-42581

Netty vulnerability CVE-2026-42581 affects Netty in HTTP handling. Before 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder does not clear a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length for HTTP/1.1; HTTP/1.0 requests lack this guard....

CVE-2026-42581

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1 messages. The guard is absen...

CVE-2026-42581 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1 messages. The guard is absen...

CVE-2026-42581 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1 messages. The guard is absen...

CVE-2026-44431

urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connectionfromurl.urlopen..., assertsamehost=False still forward these sensitive headers. This vulnerability is fixed in 2.7.0...

ALPINE-CVE-2026-42945

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewritemodule module. This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression PCRE capture for example, $1, $2 with a replacement strin...

CVE-2026-40460

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting. Note: Software versions which have reached End of Technical Support EoTS are not evaluated...

ALPINE-CVE-2026-40460

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting. Note: Software versions which have reached End of Technical Support EoTS are not evaluated...

SUSE CVE-2017-12425

An issue was discovered in Varnish HTTP Cache 4.0.1 through 4.0.4, 4.1.0 through 4.1.7, 5.0.0, and 5.1.0 through 5.1.2. A wrong if statement in the varnishd source code means that particular invalid requests from the client can trigger an assert, related to an Integer Overflow. This causes the...

Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass in the handling of internal service references by the Gateway API provider. An attacker can gain unauthorized dynamic configuration write access by creating or updating an HTTPRoute that targets rest@internal, even...

CVE-2026-44432

urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion 1 during the second HTTPResponse.readamt=N call when the response was decompressed using the official Brotli library or 2 when...

HTTP/2 request injection in the ngx_http_proxy_module

HTTP/2 request injection in the ngxhttpproxymodule Severity: medium CVE-2026-42926 Not vulnerable: 1.31.0+, 1.30.1+ Vulnerable: 1.29.4-1.30.0...

CVE-2026-42926

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support EoTS are not...

CVE-2026-42926 NGINX ngx_http_proxy_v2_module vulnerability

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support EoTS are not...