CVE-2026-50131

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% 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, secondary
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

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

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/internal network access in GHSA-p9cg-vqcc-grcx by adding public URL validation before runtime document and media fetching. However, the IPv4 validation logic present starting in version 0.11.2 and prior to versions 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 appears incomplete. The validatePublicUrl() protection relies on isValidPublicIPv4Address() to reject non-public IPv4 destinations. The function blocks common private and local ranges such as 10.0.0.0/8, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, and 192.168.0.0/16, but it still treats several special-use, reserved, multicast, benchmarking, and carrier-grade NAT IPv4 ranges as valid public destinations. Because this validation is used as an SSRF defense before outbound fetches, this appears to be an incomplete mitigation or bypass class for the previous SSRF issue. Versions 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 contain an updated patch.

CVSS v3
8.6
EG Score
8.6(medium)
EPSS
18.6%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 11, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Incomplete SSRF mitigation after GHSA-p9cg-vqcc-grcx: validatePublicUrl allows special-use IPv4 ranges · Advisory · fedify-dev/fedify · GitHub

https://github.com/fedify-dev/fedify/security/advisories/GHSA-xw9q-2mv6-9fr8

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 99× 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 103 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-50131?
CVE-2026-50131 is a high vulnerability published on June 10, 2026. Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/internal network access in GHSA-p9cg-vqcc-grcx by adding public URL validation before runtime document and media fetching. However, the IPv4 validation logic present starting…
When was CVE-2026-50131 disclosed?
CVE-2026-50131 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50131 actively exploited?
CVE-2026-50131 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50131?
CVE-2026-50131 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-50131?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50131, 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

Explore the affected products and dependency analysis for CVE-2026-50131

Explore →

Is Your Infrastructure Affected by CVE-2026-50131?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs