CVE-2026-73530

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

Score 7.7 from GitHub Security Advisory published 2026-08-13. a secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: Elevated riskExposed: 0

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

Flyto2 Core before 2.28.0 contains a server-side request forgery guard bypass vulnerability that allows attackers to reach internal services by supplying URLs using the unblocked IPv6 address :: which the kernel routes to loopback identically to 0.0.0.0. Attackers can submit requests or trigger 302 redirects to to bypass the private IP range and blocked hostname checks in is_private_ip(), reaching services bound to IPv6 loopback across the http.get, http.request, and http.batch` modules.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity77% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

August 13, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_release.
generic

Flyto2 Core < 2.28.0 SSRF Guard Bypass via is_private_ip() | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flyto2-core-ssrf-guard-bypass-via-is-private-ip
github_release Patch Available

flyto-core v2.28.0 — IPv6 SSRF hardening and extension management

Patch available: flytohub/flyto-core v2.28.0

https://github.com/flytohub/flyto-core/releases/tag/v2.28.0
github Patch Available🟡 PoC Available

SSRF guard bypass: the IPv6 unspecified address :: is not classified as private, reaching IPv6 loopback via http.get/http.request/http.batch · Advisory · flytohub/flyto-core · GitHub

https://github.com/flytohub/flyto-core/security/advisories/GHSA-gc4h-hj7x-gp5p

Vendor Advisories for CVE-2026-73530(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 112× 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 154 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73530?
CVE-2026-73530 is a high vulnerability published on August 13, 2026. Flyto2 Core before 2.28.0 contains a server-side request forgery guard bypass vulnerability that allows attackers to reach internal services by supplying URLs using the unblocked IPv6 address :: which the kernel routes to loopback identically to 0.0.0.0. Attackers can submit requests or trigger 302…
When was CVE-2026-73530 disclosed?
CVE-2026-73530 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73530 actively exploited?
CVE-2026-73530 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.3% of all scored CVEs.
What is the CVSS score of CVE-2026-73530?
CVE-2026-73530 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-73530?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73530, 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.

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