CVE-2026-39087

critical

Published 2026-04-23 · Modified 2026-05-08

CVSS v3

9.8

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

CVSS v2

—

VIR risk

9.8

Description

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

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	heckel.io/ntfy/v2	`<2.22.0`	`2.22.0`
GO	heckel.io/ntfy/v2	`< 2.22.0`	`2.22.0`

References

CWEs

CWE-94

Verify integrity in audit chain (admin only). AS-IS.