CVE-2026-39087 json
ntfy.sh allows a remote attacker to execute arbitrary code via the parseActions function
published 2026-04-23 6 mo ago modified 2026-07-05 4 mo ago also GHSA-pqhx-w72w-m393 , GO-2026-5551 , EUVD-2026-25232
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.
Patch / fix
- go heckel.io/ntfy/v2 2.22.0
- ntfy ntfy 2.22.0
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | heckel.io/ntfy/v2 | <2.22.0 |
2.22.0 |
| go | heckel.io/ntfy | all versions |
no fix listed |
Affected products
- ntfy ntfy
Classification
References
Sources
- CVE List CVE-2026-39087
- GitHub Advisory GHSA-pqhx-w72w-m393
- NVD CVE-2026-39087
- OSV GO-2026-5551
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.