CVE-2026-39087
Medium
Description
ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.
SeverityMedium
CVSS6.4
Exploit probability—
ProductHeckel.io/ntfy/v2
PublishedApr 23, 2026
First seenApr 23, 2026
Weakness typeCWE-777CWE-777
How to fix
Update
- heckel.io/ntfy/v22.22.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| heckel.io/ntfy/v2Go | v < 2.22.0 | 2.22.0 |
| heckel.io/ntfyGo | No range specified | — |
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