CVE-2026-23930
CVE-2026-23930 is a high-severity vulnerability in Zabbix with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-405.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v4: 5.3
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-405
- Affected product: Zabbix
- Published:
- Last modified:
Description
An unauthenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend popup.testtriggerexpr action, leading to potential denial of service.
Frequently asked questions
- What is CVE-2026-23930?
- An unauthenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend popup.testtriggerexpr action, leading to potential denial of service.
- How severe is CVE-2026-23930?
- CVE-2026-23930 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-23930 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-23930?
- CVE-2026-23930 affects Zabbix. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-23930?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-23930 published?
- CVE-2026-23930 was published on 2026-08-18 and last updated on 2026-09-08.
References
Affected products (1)
- cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
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