CVE-2026-47684

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 87% 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
7.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.7Exploit: NoneExposed: 0

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

Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses (e.g. ::ffff:127.0.0.1), allowing SSRF protection to be bypassed on dual-stack systems. Version 2.3.0 fixes the issue.

CVSS v3
7.7
EG Score
7.7(medium)
EPSS
12.6%
KEV
Not listed

Published

June 5, 2026

Last Modified

June 16, 2026

Advisory Details (2)

Auto-updated Jun 16, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

SSRF protection bypass via IPv4-mapped IPv6 addresses in regExpPrivateIP · Advisory · Sync-in/server · GitHub

https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg
github_release Patch Available

v2.3.0

Patch available: Sync-in/server v2.3.0

https://github.com/Sync-in/server/releases/tag/v2.3.0

Vendor Advisories for CVE-2026-47684(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@sync-in/server—2.3.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 79× 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.

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

Frequently asked(5)

What is CVE-2026-47684?
CVE-2026-47684 is a high vulnerability published on June 5, 2026. Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses (e.g. ::ffff:127.0.0.1), allowing SSRF protection to be bypassed…
When was CVE-2026-47684 disclosed?
CVE-2026-47684 was first published in the National Vulnerability Database on June 5, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47684 actively exploited?
CVE-2026-47684 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-47684?
CVE-2026-47684 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-47684?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47684, 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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