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CVE-2026-16639— Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081

Quick assessment

Affected
Drupal Internationalization Single Sign-On
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Drupal Internationalization Single Sign-On是Drupal组织的一款提供国际化单点登录功能的插件。 Drupal Internationalization Single Sign-On 0.0.0版本至1.8.0版本存在授权问题漏洞，该漏洞源于使用备用路径或通道绕过身份验证，可能导致身份验证被绕过。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.37% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
Drupal Internationalization Single Sign-On 0.0.0< 1.8.0 affected
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I. Basic Information for CVE-2026-16639

Vulnerability Information
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Vulnerability Title
Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081
Source: CVE Program / CVE List V5
Vulnerability Description
Authentication 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Drupal Internationalization Single Sign-On 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Drupal Internationalization Single Sign-On是Drupal组织的一款提供国际化单点登录功能的插件。 Drupal Internationalization Single Sign-On 0.0.0版本至1.8.0版本存在授权问题漏洞，该漏洞源于使用备用路径或通道绕过身份验证，可能导致身份验证被绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Drupal Internationalization Single Sign-On 0.0.0 ~ 1.8.0 -

II. Public POCs for CVE-2026-16639

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III. Intelligence Information for CVE-2026-16639

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Same Patch Batch · Drupal · 2026-08-25 · 17 CVEs total

CVE-2026-15088 Development Environment - Critical - Unsupported - SA-CONTRIB-2026-089
CVE-2026-15917 Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-011
CVE-2026-15916 Drupal core - Moderately critical - Information disclosure - SA-CORE-2026-010
CVE-2026-16641 Commerce Elavon - Critical - Unsupported - SA-CONTRIB-2026-084
CVE-2026-16643 Lunr exposed filters - Critical - Unsupported - SA-CONTRIB-2026-086
CVE-2026-16640 Search API Autocomplete - Moderately critical - Cross-site Scripting - SA-CONTRIB-2026-082
CVE-2026-16646 PanKM - Critical - Unsupported - SA-CONTRIB-2026-083
CVE-2026-16645 PhotoSwipe - Responsive JavaScript Modal Image Gallery - Moderately critical - Access bypa
CVE-2026-16644 Webform REST - Moderately critical - Access bypass - SA-CONTRIB-2026-087
CVE-2026-16638 Media Folders - Moderately critical - Cross site scripting - SA-CONTRIB-2026-080
CVE-2026-16642 Email Login OTP - Critical - Unsupported - SA-CONTRIB-2026-085
CVE-2026-18261 Powerful Surveys - Critical - Unsupported - SA-CONTRIB-2026-092
CVE-2026-18985 Edit in-place field - Moderately critical - Access bypass - SA-CONTRIB-2026-093
CVE-2026-18260 Disable Login Page - Moderately critical - Access bypass - SA-CONTRIB-2026-110
CVE-2026-18259 Token Content Access - Moderately critical - Access bypass - SA-CONTRIB-2026-090
CVE-2026-55805 Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-012

IV. Related Vulnerabilities

Same vendor: Drupal
Same weakness: CWE-288

V. Comments for CVE-2026-16639

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