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SonicWall warns of an exploited VPN bypass flaw, according to security reports

SonicWall patches an exploited VPN bypass, Google proposes digital ID recovery to protect passkeys, and Keycloak faces a critical SAML signature flaw.

SonicOS firewall hardware appliance in a server rack

SonicWall patches exploited VPN bypass

SonicWall released security updates for seven vulnerabilities in SonicOS firewalls [7]. One of these is an SSL-VPN authentication bypass flaw that attackers are currently exploiting [7].

Google proposes digital ID for recovery

Google is developing an account recovery method using signed digital identity credentials to replace weaker traditional procedures [6]. The company aims to prevent scenarios where lost phones force users toward recovery methods that undermine the security of passkeys [6].

Claire Forszt, Google product manager for authentication and account recovery, stated at Authenticate 2026 that "if a passkey can be recovered with a lower security bar than the passkey holds, then the security benefit essentially becomes moot" [6].

Under the proposed scheme, users register a digital identity credential in advance to generate a "stable hash" linked to their account [6]. If a user loses their device, they can obtain a new credential after verifying their identity with the issuing authority [6].

Google predicts digital IDs could account for 50% of all account recovery methods by 2035 [6]. However, the system faces hurdles including technical interoperability between digital wallets and operating systems, as well as the speed of credential issuance [6].

Keycloak SAML signature flaw

A vulnerability in Keycloak, tracked as CVE-2026-117691, allows attackers to bypass SAML HTTP-Redirect signature verification to impersonate federated users [5]. Red Hat assigned the flaw a CVSS v3.1 score of 9.1 [5].

The flaw stems from a mismatch in how Keycloak processes parameter names [5]. The system decodes percent-encoded names during message processing, but the signature-verification logic only recognizes literal names [5]. An attacker with their own account at an external identity provider can use this inconsistency to process a crafted unsigned message as if it were signed [5].

Keycloak released a fix in version 26.8.2 on November 5, 2026 [5]. CERT Santé reported on November 6 that while an open-source proof of concept exists, active exploitation has not been observed [5].

Session tokens bypass MFA controls

Technical reports from Vulnerability Mechanics indicate that stolen session tokens now allow attackers to bypass passwords and multi-factor authentication (MFA) [3]. Because MFA is a checkpoint at the login screen, it does not trigger when an attacker replays a token issued after a legitimate user has already authenticated [3].

Session hijacking is growing 127% year-over-year [3]. In 2024, analysts recovered more than 17 billion stolen cookie records from the dark web [3]. Common delivery methods include:

  • Infostealer malware: Tools like Lumma, Vidar, and RedLine read cookies directly from browser storage [3].
  • Browser-in-the-Middle: Attackers proxy sessions in real time to grab tokens after authentication [3].
  • XSS-based theft: Malicious scripts ship cookies from the victim's browser to an attacker's server [3].

OAuth misconfigurations in SaaS

Misconfigured OAuth 2.0 flows are enabling account takeovers in SaaS environments [2]. A primary risk is the use of refresh tokens that never expire [2].

In March 2025, attackers breached Salesloft's GitHub environment and used non-expiring OAuth tokens tied to a Drift integration to reach Salesforce instances at over 700 organizations [2]. A similar compromise at Allianz Life exposed 1.1 million customer records [2].

Other risks include redirect URI validation failures [2]. If a server uses wildcard or path-prefix matching instead of exact-match comparisons, attackers can redirect authorization codes to their own domains [2].

What we don't know

  • Which specific SonicOS versions are affected by the SSL-VPN bypass?
  • Whether Red Hat has issued a supported remediation package for RHBK deployments regarding CVE-2026-117691.
  • Which specific public-private partnerships Google requires to build social acceptance for digital ID recovery.

Spotted an error or have more information? Report a correction.

Sources

  1. [2] OAuth 2.0 Misconfiguration in SaaS Authorization Flows — Vulnerability Mechanics, Sep 17, 2026
  2. [3] Session Fixation and Session Hijacking in Modern Web Apps — Vulnerability Mechanics, Sep 16, 2026
  3. [5] Keycloak CVE-2026-117691: SAML Signature Bypass Enables Federated Account Takeover - Rescana — rescana.com, Nov 6, 2026
  4. [6] Google proposes using digital credentials for secure account recovery — biometricupdate.com, Nov 6, 2026
  5. [7] SonicWall warns of new SSL-VPN MFA bypass flaw exploited in attacks — BleepingComputer, Nov 6, 2026

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