ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.
Priority MEDIUM 49CWE-777Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-94.
Summary
ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00272 19th percentileScored 2026-11-07
Fix Fixed ntfy (ntfy): 2.22.0heckel.io/ntfy/v2 (Go): 2.22.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ntfy | ntfy | before 2.22.0 | 2.22.0 | Patch available | CNA |
| — | heckel.io/ntfy/v2 (Go) | before 2.22.0 | 2.22.0 | Patch available | GHSA-pqhx-w72w-m393 |
- ntfy Vendorntfy Affected before 2.22.0 Fixed in 2.22.0 Patch available CNA
- heckel.io/ntfy/v2 (Go) Vendor— Affected before 2.22.0 Fixed in 2.22.0 Patch available GHSA-pqhx-w72w-m393
Remediation
- Fix · CNA ntfy (ntfy) Fixed in 2.22.0
- Fix · GHSA-pqhx-w72w-m393 heckel.io/ntfy/v2 (Go) Fixed in 2.22.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39087
- 2026-10-03 Alias added: GHSA-pqhx-w72w-m393
References
Sources
- CVE-2026-39087 · CVE Program
- CVE-2026-39087 · NVD
- FIRST EPSS
- GHSA-pqhx-w72w-m393 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences