CVE-2026-23934
CVE-2026-23934 is a medium-severity vulnerability in Zabbix with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
- CVSS v4: 5.1
- EPSS exploit prediction: 0% (27th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-405
- Affected product: Zabbix
- Published:
- Last modified:
Description
An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.
Frequently asked questions
- What is CVE-2026-23934?
- An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.
- How severe is CVE-2026-23934?
- CVE-2026-23934 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-23934 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-23934?
- CVE-2026-23934 affects Zabbix. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-23934?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-23934 published?
- CVE-2026-23934 was published on 2026-08-18 and last updated on 2026-09-23.
References
Affected products (1)
- cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
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