CVE-2026-39087: An issue in Ntfy ntfy.sh before v.2.21 allows a remote attacker to execute arbitrary code via the parseActions function
CRITICAL
CVSS 9.5
Published: April 23, 2026 | Last Modified: April 23, 2026
Description
An issue in Ntfy ntfy.sh before v.2.21 allows a remote attacker to execute arbitrary code via the parseActions function
Ghostwire Analysis — What This Means Practically
- Critical CVSS score indicates maximum severity — remote code execution, authentication bypass, or complete system compromise is likely possible.
This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.
Security Coverage (2 articles)
References