CVE-2026-3531: Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect / OAuth client

Q: How do I fix CVE-2026-3531?

openid connect \/ oauth client: upgrade to 8.x-1.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-3531 being exploited?

CVE-2026-3531 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-3531 affect?

CVE-2026-3531 affects openid connect \/ oauth client. Severity is medium (CVSS 6.5). 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.

Q: How urgent is CVE-2026-3531?

Priority 27/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-3531 is a medium-severity flaw (CVSS 6.5) affecting openid connect \/ oauth client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-288
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): Drupal.org · Vendor: bojanz

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 21:17 UTCPublished CVE record published
2026-06-17 10:43 UTCUpdated Record last modified

bojanz openid connect \/ oauth client UPGRADE

Affected: < 8.x-1.5

Fixed in: 8.x-1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openid-connect--oauth-client || rpm -q openid-connect--oauth-client || openid-connect--oauth-client --version

2. UPGRADE to 8.x-1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openid-connect--oauth-client

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openid-connect--oauth-client

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3531?

openid connect \/ oauth client: upgrade to 8.x-1.5. Exact commands for each OS are on this page.

Is CVE-2026-3531 being exploited?

CVE-2026-3531 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3531 affect?

CVE-2026-3531 affects openid connect \/ oauth client. Severity is medium (CVSS 6.5). 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.

How urgent is CVE-2026-3531?

Priority 27/100. No elevated risk signals yet.

Software pages

Drupal vulnerabilities

Related CVEs

CVE-2026-3532 MEDIUM 4.2 UPGRADE Improper Handling of Case Sensitivity vulnerability in Drupal OpenID Connect / OAuth client allows Privilege E
CVE-2026-3530 MEDIUM 4.3 UPGRADE Server-Side Request Forgery (SSRF) vulnerability in Drupal OpenID Connect / OAuth client allows Server Side Re

References

← Back to latest CVEs