Medium severity · published May 21, 2026
CVE-2026-4929
Simple Hierarchical Select (Drupal 7) XSS in term-derived output
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
Simple Hierarchical Select (SHS) for Drupal 7 contains cross-site scripting risk due to improper output escaping of term-derived text. Confirmed affected paths include field formatter output (shs_field_formatter_view) and term-tree child-term data generation (shs_term_get_children). Malicious taxonomy term names can be rendered unsafely depending on output context.
This affects versions from 7.x-1.0 through (and including) 7.x-1.10.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DR
Drupal · Drupal
7.x-1.0 before 7.x-1.11 · source: vendor
SH
Simple Hierarchical Select · Simple Hierarchical Select Project
7.x-1.0 through 7.x-1.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4929
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4929
Third Party Advisory
https://d7es.tag1.com/security-advisories/simple-hierarchical-select-moderately-critical-cross-site-scripting
Exploit
https://www.herodevs.com/vulnerability-directory/cve-2026-4929
Exploit
https://www.herodevs.com/vulnerability-directory/cve-2026-4929?nes-for-drupal-7
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