What’s Vulnerable › Vulnerabilities

CVE-2025-26042

• Severity: medium (CVSS 6.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-17 · updated 2026-06-17
• Weakness: CWE-1333

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.

References

• https://github.com/louislam/uptime-kuma/commit/7a9191761dbef6551c2a0aa6eed5f693ba48d688
• https://github.com/louislam/uptime-kuma/issues/5574
• https://github.com/louislam/uptime-kuma/pull/5573

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