PT-2026-34669 · Ntfy.Sh · Ntfy.Sh

Mightynawaf · CVE-2026-39087 · Published 2026-04-23 · Updated 2026-07-30

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions ntfy.sh versions prior to 2.21

Description A remote attacker can execute arbitrary code through the parseActions() function.

Recommendations Update to version 2.21 or later. As a temporary workaround, consider restricting access to the parseActions() function until the update is applied.

Exploit

Fix

RCE

Code Injection

Weakness Enumeration

CWE-777

CWE-94

Related Identifiers

CVE-2026-39087

GHSA-PQHX-W72W-M393

GO-2026-5551

OPENSUSE-SU-2026:21483-1

Affected Products

Ntfy.Sh

References · 1753

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39087.json · Exploit
• https://ubuntu.com/security/CVE-2026-39087 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39087 · Security Note
• https://osv.dev/vulnerability/GO-2026-5551 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-39087 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-pqhx-w72w-m393 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-39087 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-39087 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:21483-1 · Vendor Advisory
• https://github.com/binwiederhier/ntfy/releases/tag/v2.22.0 · Note
• https://github.com/binwiederhier/ntfy · Note
• https://suse.com/security/cve/CVE-2025-65797 · Note
• https://suse.com/security/cve/CVE-2026-44427 · Note
• https://suse.com/security/cve/CVE-2026-27589 · Note
• https://suse.com/security/cve/CVE-2026-7736 · Note