CVE-2026-3531

mediumpriority · track · 0OT risk · elevatedEPSS 0.003 · 17 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (17th) EPSS

CVSS 6.5 · medium

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-288US

affected products (5)

Products and version ranges known to be affected.

Open Source Drupal OpenID Connect <1.5.0all versionscert_bundDE
Open Source Drupal≤ OpenID Connect <1.5.0cert_bundDE
Drupal OpenID Connect / OAuth client0.0.0 → 1.5.0enisa_euvdEU
bojanz openid connect / oauth client< 8.x-1.5nvdUScpe:2.3:a:bojanz:openid_connect_\/_oauth_client:*:*:*:*:*:*:*:*
Packagist:https://packages.drupal.org/8 drupal/openid_connect< 1.5.0osvUSpkg:composer/drupal/openid_connect?repository_url=https:%2F%2Fpackages.drupal.org%2F8

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0599Drupal Extensions: Mehrere SchwachstellenDeutsch2026-03-04csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Drupal-Erweiterungen ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.
DRUPAL-CONTRIB-2026-0262026-03-04vendor · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-03-26modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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