CVE-2026-16639 json
Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081
published 2026-07-22 3 mo ago modified 2026-09-10 1 mo ago also DRUPAL-CONTRIB-2026-081 , EUVD-2026-66181
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist drupal/i18n_sso 1.8.0
- Drupal Internationalization Single Sign-On 1.8.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | drupal/i18n_sso | <1.8.0 |
1.8.0 |
Affected products
- Drupal Internationalization Single Sign-On
Classification
- Weakness
-
- CWE-288 Authentication Bypass Using an Alternate Path or Channel
References
Sources
- CVE List CVE-2026-16639
- NVD CVE-2026-16639
- OSV DRUPAL-CONTRIB-2026-081
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