Improper Authentication

Overview golang.org/x/crypto/ssh is a SSH client and server Affected versions of this package are vulnerable to Improper Authentication due to the Verify method not checking the User Presence flag in FIDO/U2F security key types. An attacker can perform unauthorized authentication by generating...

GO-2026-5016 Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for...

GO-2026-5023 Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh

Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped...

ROOT-APP-GOBINARY-CVE-2025-58181 CVE-2025-58181 in rootio-golang.org/x/crypto - Patched by Root

Root has patched CVE-2025-58181 in the rootio-golang.org/x/crypto package for Root:Go. Multiple fixed versions available...

crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building

A flaw was found in the Go standard library packages crypto/x509 and crypto/tls. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being...

net/url: Incorrect parsing of IPv6 host literals in net/url

The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid...

ROOT-APP-GOBINARY-CVE-2026-32286 CVE-2026-32286 in rootio-github.com/jackc/pgproto3/v2 - Patched by Root

Root has patched CVE-2026-32286 in the rootio-github.com/jackc/pgproto3/v2 package for Root:Go. Multiple fixed versions available...

ROOT-APP-GOBINARY-CVE-2025-30204 CVE-2025-30204 in rootio-github.com/golang-jwt/jwt/v4 - Patched by Root

Root has patched CVE-2025-30204 in the rootio-github.com/golang-jwt/jwt/v4 package for Root:Go. Multiple fixed versions available...

Unity Linux 20.1050e / 20.1070e Security Update: kubernetes (UTSA-2026-016795)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016795 advisory. spdystream is a Go library for multiplexing streams over SPDY connections. In versions 0.5.0 and below, the SPDY/3 frame parser does not validate attacker-controlled...

GO-2026-4918 Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGSMAXFRAMESIZE with a value of 0...

CLEANSTART-2026-DN20646 spdystream is a Go library for multiplexing streams over SPDY connections

Multiple security vulnerabilities affect the percona-xtradb-cluster-operator-fips package. spdystream is a Go library for multiplexing streams over SPDY connections. See references for individual vulnerability details...

go-ntlmssp NTLM challenges can panic on malformed payloads

go-ntlmssp is a Go package that provides NTLM/Negotiate authentication over HTTP. Prior to version 0.1.1, a malicious NTLM challenge message can causes an slice out of bounds panic, which can crash any Go process using ntlmssp.Negotiator as an HTTP transport. Version 0.1.1 patches the issue...

CVE-2026-40890

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

UBUNTU-CVE-2026-40890

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with...

UBUNTU-CVE-2026-40611

Let's Encrypt client and ACME library written in Go Lego. Prior to 4.34.0, the webroot HTTP-01 challenge provider in lego is vulnerable to arbitrary file write and deletion via path traversal. A malicious ACME server can supply a crafted challenge token containing ../ sequences, causing lego to...

net/url: Incorrect parsing of IPv6 host literals in net/url

The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid...

CVE-2026-35469

spdystream is a Go library for multiplexing streams over SPDY connections. In versions 0.5.0 and below, the SPDY/3 frame parser does not validate attacker-controlled counts and lengths before allocating memory. Three allocation paths are affected: the SETTINGS frame entry count, the header count ...

Insecure Default Initialization of Resource

Overview Affected versions of this package are vulnerable to Insecure Default Initialization of Resource due to DNS rebinding protection being disabled by default in HTTP-based servers using StreamableHTTPHandler or SSEHandler. An attacker can access internal resources or invoke tools exposed by...

net/url: Incorrect parsing of IPv6 host literals in net/url

The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid...

GHSA-89XV-2J6F-QHC8 Cross-Site Tool Execution for HTTP Servers without Authorizatrion in github.com/modelcontextprotocol/go-sdk

The Go SDK's Streamable HTTP transport accepted browser-generated cross-site POST requests without validating the Origin header and without requiring Content-Type: application/json. In deployments without Authorization, especially stateless or sessionless configurations, this allows an arbitrary...