CVE-2025-26042

Description

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.

Category

6.0
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/louislam/uptime-kuma/issues/5574
https://github.com/louislam/uptime-kuma/pull/5573

Frequently Asked Questions

What is the severity of CVE-2025-26042?
CVE-2025-26042 has been scored as a medium severity vulnerability.
How to fix CVE-2025-26042?
To fix CVE-2025-26042, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-26042 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-26042 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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