CVE-2026-39087

FAUCET Score

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

First published: Apr 23, 2026Last modified: Jul 4, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
Ntfy	Ntfy	>= 0, < 2.22.0CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

3.1

Impact Score

2.7

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.27%

Probability of exploitation in next 30 days

EPSS Percentile

19.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0027 is in the 2nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa

Product: heckel.io/ntfy/v2Fixed in: 2.22.0

Vendor Advisories (1)

goGHSA-pqhx-w72w-m393critical

ntfy.sh allows a remote attacker to execute arbitrary code via the parseActions function

Apr 23, 2026

References

gist.github.com / MightyNawaf/5d41d6e8ead16e217f86b016002ecae5

github.com / binwiederhier/ntfy/releases/tag/v2.22.0

ntfy.sh