CVE-2026-3531 | OpenID Connect OAuth client up to 1.4.x on Drupal authentication bypass (sa-contrib-2026-026)

VDB-353759 · CVE-2026-3531 · SA-CONTRIB-2026-026 OPENID CONNECT OAUTH CLIENT UP TO 1.4.X ON DRUPAL AUTHENTICATION BYPASS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.0 $0-$5k 1.29+ Summaryinfo A vulnerability was found in OpenID Connect OAuth client up to 1.4.x on Drupal. It has been rated as critical. Affected is an unknown function. The manipulation leads to authentication bypass. This vulnerability is traded as CVE-2026-3531. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised. Detailsinfo A vulnerability was found in OpenID Connect OAuth client up to 1.4.x on Drupal and classified as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a authentication bypass vulnerability. Using CWE to declare the problem leads to CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. Impacted is confidentiality, integrity, and availability. The summary by CVE is: Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect / OAuth client allows Authentication Bypass.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0. The weakness was shared by Kimberley Massey as sa-contrib-2026-026. It is possible to read the advisory at drupal.org. The identification of this vulnerability is CVE-2026-3531 since 03/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. Upgrading to version 1.5.0 eliminates this vulnerability. Productinfo Name OpenID Connect OAuth client Version 1.0 1.1 1.2 1.3 1.4 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 7.0 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authentication bypass CWE: CWE-288 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: OpenID Connect OAuth client 1.5.0 Timelineinfo 03/04/2026 CVE reserved 03/26/2026 +22 days Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Advisory: sa-contrib-2026-026 Researcher: Kimberley Massey Status: Confirmed CVE: CVE-2026-3531 (🔒) GCVE (CVE): GCVE-0-2026-3531 GCVE (VulDB): GCVE-100-353759 Entryinfo Created: 03/26/2026 23:12 Changes: 03/26/2026 23:12 (56) Complete: 🔍 Cache ID: 99:C20:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸