CVE-2026-39087

MEDIUMPre-NVD 6.49.8▲
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
6.4
EG Score
9.8(medium)
EPSS
19.1%
KEV
Not listed

Published

April 23, 2026

Last Modified

July 5, 2026

Advisory Details (4)

Auto-updated Jul 4, 2026
Patch available. Sources: github_release.
generic

ntfy.sh | Send push notifications to your phone via PUT/POST

https://ntfy.sh
github_release Patch Available

v2.22.0

Patch available: binwiederhier/ntfy v2.22.0

https://github.com/binwiederhier/ntfy/releases/tag/v2.22.0
generic

CVE-2026-39087.md · GitHub

https://gist.github.com/MightyNawaf/5d41d6e8ead16e217f86b016002ecae5
generic

ntfy.com - Coming Soon

http://ntfy.com

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
heckel.io/ntfy/v2—2.22.0—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 150 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-08 15:15 UTCEPSS rescore
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
  14. 2026-07-06 16:27 UTCEPSS rescore
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-05 02:36 UTCMITRE cvelistV5CVSS v3 → 6.4 · severity → MEDIUM
  18. 2026-07-05 02:30 UTCEPSS rescore
  19. 2026-07-04 16:28 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  20. 2026-07-04 15:46 UTCMITRE cvelistV5CVSS v3 → 6.4 · severity → MEDIUM
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-01 15:06 UTCEPSS rescore
  23. 2026-06-30 23:22 UTCEPSS rescore
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-27 03:08 UTCEPSS rescore
  3. 2026-06-25 13:49 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-23 21:33 UTCEPSS rescore
  7. 2026-06-22 14:25 UTCEPSS rescore
  8. 2026-06-22 14:25 UTCEPSS rescore
  9. 2026-06-21 14:56 UTCEPSS rescore
  10. 2026-06-21 14:56 UTCEPSS rescore
  11. 2026-06-21 01:59 UTCEPSS rescore
  12. 2026-06-19 19:25 UTCEPSS rescore
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  14. 2026-06-18 17:52 UTCEPSS rescore
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  16. 2026-06-17 17:53 UTCEPSS rescore
  17. 2026-06-16 17:52 UTCEPSS rescore
  18. 2026-06-15 17:49 UTCEPSS rescore
  19. 2026-06-15 02:26 UTCEG score recompute
  20. 2026-06-14 23:18 UTCEPSS rescore
  21. 2026-06-14 21:10 UTCEG score recompute
  22. 2026-06-14 16:46 UTCEG score recompute
  23. 2026-06-14 12:20 UTCEG score recompute
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
  26. 2026-06-12 23:12 UTCEPSS rescore
  27. 2026-06-12 12:42 UTCEG score recompute
  28. 2026-06-12 08:19 UTCEG score recompute
  29. 2026-06-12 03:37 UTCEG score recompute
  30. 2026-06-11 23:14 UTCEG score recompute
  31. 2026-06-11 18:50 UTCEG score recompute
  32. 2026-06-11 14:26 UTCEG score recompute
  33. 2026-06-11 14:00 UTCEPSS rescore
  34. 2026-06-10 22:18 UTCEPSS rescore
  35. 2026-06-10 21:57 UTCEG score recompute
  36. 2026-06-10 17:33 UTCEG score recompute
  37. 2026-06-10 13:22 UTCEPSS rescore
  38. 2026-06-10 13:10 UTCEG score recompute
  39. 2026-06-10 08:46 UTCEG score recompute
  40. 2026-06-10 04:23 UTCEG score recompute
  41. 2026-06-09 23:58 UTCEG score recompute
  42. 2026-06-09 18:33 UTCEG score recompute
  43. 2026-06-09 14:10 UTCEG score recompute
  44. 2026-06-09 09:46 UTCEG score recompute
  45. 2026-06-09 03:28 UTCEG score recompute
  46. 2026-06-08 14:17 UTCEPSS rescore
  47. 2026-06-08 14:17 UTCEPSS rescore
  48. 2026-06-08 12:21 UTCEG score recompute
  49. 2026-06-08 07:50 UTCEG score recompute
  50. 2026-06-08 03:26 UTCEG score recompute
  51. 2026-06-07 23:02 UTCEG score recompute
  52. 2026-06-07 18:39 UTCEG score recompute
  53. 2026-06-07 15:25 UTCEPSS rescore
  54. 2026-06-07 15:25 UTCEPSS rescore
  55. 2026-06-07 15:25 UTCEPSS rescore
  56. 2026-06-07 14:12 UTCEG score recompute
  57. 2026-06-07 09:42 UTCEG score recompute
  58. 2026-06-07 05:11 UTCEG score recompute
  59. 2026-06-07 00:48 UTCEG score recompute
  60. 2026-06-06 20:19 UTCEG score recompute
  61. 2026-06-06 15:55 UTCEG score recompute
  62. 2026-06-06 13:47 UTCEPSS rescore
  63. 2026-06-06 13:47 UTCEPSS rescore
  64. 2026-06-06 10:44 UTCEG score recompute
  65. 2026-06-06 05:44 UTCEG score recompute
  66. 2026-06-06 01:18 UTCEG score recompute
  67. 2026-06-05 22:47 UTCEPSS rescore
  68. 2026-06-05 22:47 UTCEPSS rescore
  69. 2026-06-05 20:55 UTCEG score recompute
  70. 2026-06-05 16:25 UTCEG score recompute
  71. 2026-06-05 11:57 UTCEG score recompute
  72. 2026-06-05 07:34 UTCEG score recompute
  73. 2026-06-05 06:10 UTCEPSS rescore
  74. 2026-06-05 06:10 UTCEPSS rescore
  75. 2026-06-05 03:03 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39087?
CVE-2026-39087 is a medium vulnerability published on April 23, 2026. ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.
When was CVE-2026-39087 disclosed?
CVE-2026-39087 was first published in the National Vulnerability Database on April 23, 2026, with the most recent update on July 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39087 actively exploited?
CVE-2026-39087 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39087?
CVE-2026-39087 has a CVSS v4.0 base score of 6.4 (CNA self-assessment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2026-39087?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39087, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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