Medium severity6.0OSV Advisory· Published Mar 17, 2025· Updated Apr 15, 2026
CVE-2025-26042
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
uptime-kumanpm | >= 1.15.0, <= 1.23.16 | — |
uptime-kumanpm | >= 2.0.0-beta.0, < 2.0.0-beta.2 | 2.0.0-beta.2 |
Affected products
2- Range: 1.0.0, 1.0.1, 1.0.10, …
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-hx7h-9vf7-5xhgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-26042ghsaADVISORY
- gist.github.com/ShiyuBanzhou/26c918f93b07f5ce90e8f7000d29c7a0ghsaWEB
- gist.github.com/ShiyuBanzhou/bf4cee61603e152c114fa8c4791f9f28ghsaWEB
- github.com/louislam/uptime-kuma/commit/7a9191761dbef6551c2a0aa6eed5f693ba48d688nvdWEB
- github.com/louislam/uptime-kuma/issues/5574nvdWEB
- github.com/louislam/uptime-kuma/pull/5573nvdWEB
- github.com/louislam/uptime-kuma/security/advisories/GHSA-hx7h-9vf7-5xhgghsaWEB
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