CVE-2026-3531
OpenID Connect / OAuth client - Moderately critical - Access bypass - SA-CONTRIB-2026-026
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
OpenID Connect / OAuth client - Moderately critical - Access bypass - SA-CONTRIB-2026-026
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.
- Record
CVE-2026-3531- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-288
- Updated
- 2026-11-02
EUVDEUVD-2026-16387
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.
- Record
EUVD-2026-16387- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-f2x9-px9q-jxw2
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect /...
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.
- Record
GHSA-f2x9-px9q-jxw2- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-288
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-3531- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-288
- Updated
- 2026-11-02
OSVCLSA-2026-1788968613 No score
TuxCare security update for drupal/openid_connect (3 CVEs)
TuxCare rebuilt drupal/openid_connect to address 3 CVEs. Fixed in 7.1.3-p1+tuxcare.
- Record
CLSA-2026-1788968613- Updated
- 2026-11-02
OSVDRUPAL-CONTRIB-2026-026 No score
This module enables you to use an external OpenID Connect login provider to authenticate and log in users on your site. If a user signs in with a login provider for the first time on the website, a new Drupal user will be created.
A visitor who successfully logs in to their Identity Provider and is denied access to Drupal through custom code or a server error will maintain their session at the Identity Provider, possibly leading to access bypass situations, especially in a shared computing environment.
- Record
DRUPAL-CONTRIB-2026-026- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
drupal/openid_connectTuxCare:Packagist From an advisory covering 3 CVEs |
7.1.3 up to 7.1.3-p1+tuxcare | 7.1.3-p1+tuxcare |
drupal/openid_connectPackagist:https://packages.drupal.org/8 |
before 1.5.0 | 1.5.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-3531 is a medium vulnerability (CVSS 6.5) in Drupal Openid Connect / Oauth Client, published March 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. Fixed in drupal/openid_connect 1.5.0.