CLEANSTART-2026-HG42719 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate

CVE-2026-39835 affects multiple packages. SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. See references for individual vulnerability details...

CLEANSTART-2026-GO89521 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate

CVE-2026-39835 affects multiple packages. SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. See references for individual vulnerability details...

CLEANSTART-2026-AU10912 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate

CVE-2026-39835 affects multiple packages. SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. See references for individual vulnerability details...

CLEANSTART-2026-CT85138 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate

Security vulnerability affects the consul package. SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate...

CLEANSTART-2026-GM89854 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate

Security vulnerability affects the kube-state-metrics-fips package. SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate...

AlmaLinux 9.2 [TuxCare] Security Update: podman / podman-docker / podman-gvproxy / podman-plugins / etc (ALMALINUX9.2:CLSA-2026:1786960012)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1786960012 advisory. - SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a...

CLEANSTART-2026-BI76349 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate

Security vulnerability affects the loki package. SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate...

SUSE-SU-2026:22376-1 Security update for google-guest-agent

This update for google-guest-agent fixes the following issues - CVE-2026-33186: google.golang.org/grpc: authorization bypass due to improper validation of the HTTP/2 :path pseudo- header bsc1260264. - CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allo...

golang.org/x/crypto: Invoking VerifiedPublicKeyCallback permissions skip enforcement

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...

EUVD-2026-31395

golang.org/x/crypto/ssh: FIDO/U2F security key physical presence check can be bypassed...

golang.org/x/crypto: FIDO/U2F security key physical presence check can be bypassed

The Verify method for FIDO/U2F security key types [email protected], [email protected] did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior,...

GHSA-89GR-R52H-F8RX golang.org/x/crypto: FIDO/U2F security key physical presence check can be bypassed

The Verify method for FIDO/U2F security key types [email protected], [email protected] did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior,...

golang.org/x/crypto is vulnerable to invoking server panic during CheckHostKey/Authenticate flow

SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil...

OPENSUSE-SU-2026:21084-1 Security update for distribution

This update for distribution fixes the following issues - CVE-2026-33814: golang.org/x/net/http2: infinite loop in HTTP/2 transport when given bad SETTINGSMAXFRAMESIZE bsc1265788. - CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation...

CVE-2026-39831

A flaw was found in golang.org/x/crypto/ssh. The Verify method, responsible for FIDO/U2F security key types, did not properly check for user presence. This allowed signatures to be accepted without requiring a physical touch on the hardware security key. As a result, an attacker could potentially...

Linux Distros Unpatched Vulnerability : CVE-2026-39831

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The Verify method for FIDO/U2F security key types [email protected], sk-ssh- [email protected] did not check the User Presence flag. Signatur...

SUSE CVE-2026-39831

The Verify method for FIDO/U2F security key types [email protected], [email protected] did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior,...

Uncaught Exception

Overview golang.org/x/crypto/ssh is a SSH client and server Affected versions of this package are vulnerable to Uncaught Exception in the CertChecker component when used as a public key callback without setting IsUserAuthority or IsHostAuthority. An attacker can cause the server to panic by...

Uncaught Exception

Overview github.com/golang/crypto/ssh is a SSH client and server Affected versions of this package are vulnerable to Uncaught Exception in the CertChecker component when used as a public key callback without setting IsUserAuthority or IsHostAuthority. An attacker can cause the server to panic by...

Incorrect Authorization

Overview golang.org/x/crypto/ssh is a SSH client and server Affected versions of this package are vulnerable to Incorrect Authorization due to improper enforcement of permissions in the VerifiedPublicKeyCallback process. An attacker can bypass source-address validation by passing a callback type...