net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service

A flaw was found in the net/http component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the ReadHeaderTimeout is not correctly applied during this process. This...

SUSE CVE-2026-73550

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy copies every decoded HTTP/2 Host header value before discarding it when :authority is already present. The discarded value bypasses saveHeader, so its bytes a...

SUSE CVE-2026-93492

A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAXHEADERTABLESIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimatel...

SUSE CVE-2026-94184

A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response...

CVE-2026-88004

A flaw was found in Traefik, an open-source HTTP reverse proxy and load balancer. Its entrypoint defenses, designed to sanitize header names, failed to inspect request trailers. This allowed an unauthenticated client to submit malicious header names within HTTP/1.1 chunked or HTTP/2 trailers...

CVE-2026-88008

A flaw was found in Traefik, an open source HTTP reverse proxy and load balancer. A remote unauthenticated attacker can exploit this vulnerability by sending a specially crafted HTTP/2 request that includes specific upgrade headers. If the backend server accepts the upgrade, Traefik enters a raw...

CLSA-2026-1790091092 TuxCare security update for org.springframework (13 CVEs)

TuxCare rebuilt 24 org.springframework packages to address 13 CVEs. Fixed in 5.3.6-tuxcare.2...

io.netty/netty-codec-http2: io.netty/netty-codec-http3: Netty: HTTP/2 and HTTP/3 Extended CONNECT requests are downgraded as regular CONNECT requests

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical...

io.netty/netty-codec-http2: HTTP/1 authority-form CONNECT is translated to malformed HTTP/2 CONNECT with Host-controlled :authority

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

io.netty/netty-codec-http2: HTTP/1 absolute-form Host mismatch is translated to HTTP/2 :authority, overriding the request-target authority

A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2...

USN-8728-2: Linux kernel (Azure) vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

CLSA-2026-1790080840 TuxCare security update for org.springframework (2 CVEs)

TuxCare rebuilt 25 org.springframework packages to address 2 CVEs. Fixed in 6.1.14-tuxcare.2...

CLSA-2026-1790080806 TuxCare security update for org.springframework (1 CVE)

TuxCare rebuilt 26 org.springframework packages to address 1 CVE. Fixed in 6.2.5-tuxcare.2...

Denial-Of-Service (DoS)

Http4s is vulnerable to a denial-of-service DoS. The vulnerability is due to an unbounded outbound queue that can accumulate HTTP/2 acknowledgments and WINDOWUPDATE frames when the peer stops reading, which allows an unauthenticated attacker to exhaust server heap memory by sending PING, SETTINGS...

net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service

A flaw was found in the net/http component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the ReadHeaderTimeout is not correctly applied during this process. This...

CLEANSTART-2026-YX17879 When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface

Security vulnerability affects the argo-cd package. When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface...

PT-2026-105259

Security vulnerability affects the argo-cd package. When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface...

Node.js 22.x < 22.23.2 / 24.x < 24.18.1 / 26.x < 26.5.1 Multiple Vulnerabilities (Wednesday, July 29, 2026 Security Releases)

The version of Node.js used within the Brocade SANnav is not affected, but does contain the vulnerable code for the following vulnerabilities as referenced in the Wednesday, July 29, 2026 Security Releases advisory. A flaw in Node.js allows a spoofed TypedArray byteLength to trigger a reachable...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: haproxy (UTSA-2026-090137)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090137 advisory. In hpackdhtinsert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location ...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: httpd (UTSA-2026-090049)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090049 advisory. HTTP/2 2.4.20 through 2.4.39 very early pushes, for example configured with H2PushResource, could lead to an overwrite of memory in the pushing request's pool, leadi...