Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-16639
StatePUBLISHED
Assignerdrupal
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 23:16:56 UTC
Updated2026-08-28 15:29:44 UTC
DescriptionAuthentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Internationalization Single Sign-On allows Authentication Bypass. This issue affects Internationalization Single Sign-On versions: from 0.0.0 to 1.8.0.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.003460000 probability, percentile 0.273580000 (date 2026-08-30)

Problem Types: CWE-288 | CWE-288 CWE-288 Authentication Bypass Using an Alternate Path or Channel

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Drupal Internationalization Single Sign-On affected 0.0.0 1.8.0 semver Not specified

References

ReferenceSourceLinkTags
www.drupal.org/sa-contrib-2026-081 [email protected] www.drupal.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Drew Webber (mcdruid) (en)

CNA: Florent Torregrosa (grimreaper) (en)

CNA: Drew Webber (mcdruid) (en)

CNA: Bram Driesen (bramdriesen) (en)

CNA: Greg Knaddison (greggles) (en)

CNA: Drew Webber (mcdruid) (en)

CNA: Juraj Nemec (poker10) (en)

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