What is CVE-2025-26042?

CVE-2025-26042 is a medium-severity vulnerability in N/a, classified under Inefficient Regular Expression Complexity. CVSS score: 6.0/10. Published 2025-03-17.

How severe is CVE-2025-26042?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in N/a

CVE-2025-26042

Uptime Kuma >== 1.23.0 has a ReDoS vulnerability, specifically when an administrator creates a notification through the web service. If a string is provided it triggers catastrophic backtracking in the regular expression, leading to a ReDoS attack.

Vulnerability class: ReDoS (Regular Expression Denial of Service)

EPSS: 0.004 (29.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:H/A:H.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2025-26042?: CVE-2025-26042 is a medium-severity vulnerability in N/a, classified under Inefficient Regular Expression Complexity. CVSS score: 6.0/10. Published 2025-03-17.
How severe is CVE-2025-26042?: Medium severity. CVSS v3 base score is 6.0 out of 10.