Medium severity · published Aug 18, 2026
CVE-2026-23929
Prototype pollution leading to stored XSS
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
Prototype pollution vulnerability in searchParamsToObject() is leading to a persistent XSS in Maps. URL parameter processing was not filtering dangerous properties like __proto__, combined with jQuery's unsafe element creation that traversed the prototype chain.
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)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZA
Zabbix · Zabbix
6.0.44 through 6.0.45; 7.0.22 through 7.0.24; 7.4.6 through 7.4.8 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23929
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23929
Vendor Advisory
https://support.zabbix.com/browse/ZBX-28068
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