CVE-2026-87939 json
Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137
published 2026-09-09 2 mo ago modified 2026-10-22 17 d ago also DRUPAL-CONTRIB-2026-137 , EUVD-2026-107862
- cvss
- 4.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
Patch / fix
- packagist drupal/feed_block 2.0.2, 3.0.2
- Drupal Feed Block 2.0.2, 3.0.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 17 d ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | drupal/feed_block | <2.0.2 >=3.0.0, <3.0.2 |
2.0.2 3.0.2 |
Affected products
- Drupal Feed Block
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
Sources
- CVE List CVE-2026-87939
- NVD CVE-2026-87939
- OSV DRUPAL-CONTRIB-2026-137
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