What’s Vulnerable › Vulnerabilities

CVE-2026-39087

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-23 · updated 2026-07-04
• Weakness: CWE-777

Description

ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.

Affected products

• ntfy: before 2.22.0 — fixed in 2.22.0

How to fix

Upgrade to a fixed version: ntfy 2.22.0. Check the vendor advisory for mitigations.

References

• https://gist.github.com/MightyNawaf/5d41d6e8ead16e217f86b016002ecae5
• https://github.com/binwiederhier/ntfy/releases/tag/v2.22.0
• https://ntfy.sh

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