CVE-2026-23929

8.5 highEPSS 0.3%

High (8.5) in zabbix zabbix. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.5 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-31)
CWE: CWE-1321
Published: 2026-08-18
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

Affected

zabbix:zabbix

References

https://support.zabbix.com/browse/ZBX-28068

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