CVE-2026-39087

SSRF Vulnerability in ntfy Push Endpoint Validation

Published Apr 23, 2026 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Description
ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-pqhx-w72w-m393 ntfy.sh allows a remote attacker to execute arbitrary code via the parseActions function
History
Type Values Removed Values Added
Title SSRF Vulnerability in ntfy Push Endpoint Validation
Type Values Removed Values Added
Title Server‑Side Request Forgery in ntfy via Unanchored Regex
Type Values Removed Values Added
Title Server‑Side Request Forgery in ntfy via Unanchored Regex
Type Values Removed Values Added
Title SSRF Vulnerability in ntfy Due to Unanchored Endpoint URL Validation
Type Values Removed Values Added
Title SSRF Vulnerability in ntfy Due to Unanchored Endpoint URL Validation
Type Values Removed Values Added
Title SSRF via Unanchored Regular Expression in ntfy before v2.22.0
Type Values Removed Values Added
Title SSRF via Unanchored Regular Expression in ntfy before v2.22.0
Type Values Removed Values Added
Title Server‑Side Request Forgery via Unanchored URL Validation in ntfy
Type Values Removed Values Added
Title Server‑Side Request Forgery via Unanchored URL Validation in ntfy
Type Values Removed Values Added
Title SSRF Vulnerability in ntfy Web Push Endpoint Parsing
Type Values Removed Values Added
Title SSRF Vulnerability in ntfy Web Push Endpoint Parsing
Type Values Removed Values Added
Description ntfy before 2.22.0 allows SSRF because of an unanchored regular expression. ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.
Weaknesses CWE-777
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
Title Remote Code Execution via Action Parsing in Ntfy ntfy.sh
Type Values Removed Values Added
Description An issue in Ntfy ntfy.sh before v.2.21 allows a remote attacker to execute arbitrary code via the parseActions function ntfy before 2.22.0 allows SSRF because of an unanchored regular expression.
References
Type Values Removed Values Added
Title Remote Code Execution via Action Parsing in Ntfy ntfy.sh
Type Values Removed Values Added
First Time appeared Ntfy
Ntfy ntfy.sh
Vendors & Products Ntfy
Ntfy ntfy.sh
Type Values Removed Values Added
Weaknesses CWE-94
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An issue in Ntfy ntfy.sh before v.2.21 allows a remote attacker to execute arbitrary code via the parseActions function
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 5, 2026, 4:16 PM
Reserved
Apr 6, 2026, 12:00 AM
Status
Awaiting Analysis
Published
Apr 23, 2026, 4:16 PM
Modified
Jul 4, 2026, 4:17 PM