CVE-2026-3531 json
OpenID Connect / OAuth client - Moderately critical - Access bypass - SA-CONTRIB-2026-026
published 2026-03-04 8 mo ago modified 2026-09-10 1 mo ago also DRUPAL-CONTRIB-2026-026 , EUVD-2026-16387
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist drupal/openid_connect 1.5.0
- Drupal OpenID Connect / OAuth client 1.5.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-3531 updated cvss 9.1
drupal: OpenID Connect / OAuth client: Drupal OpenID Connect / OAuth client: Authentication Bypass via an alternate path or channel
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | drupal/openid_connect | <1.5.0 |
1.5.0 |
Affected products
- Drupal OpenID Connect / OAuth client
Classification
- Weakness
-
- CWE-288 Authentication Bypass Using an Alternate Path or Channel
References
-
drupal.org
/sa-contrib-2026-026
vendor-advisory, web
Sources
- CVE List CVE-2026-3531
- NVD CVE-2026-3531
- OSV DRUPAL-CONTRIB-2026-026
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.