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: 0.4%CVSS: 7.7Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
7.7HIGHmedium confidence
EG Risk
51
EG Risk 51/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 19× in last 7d / 98× 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 195 total refreshes for this CVE.

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

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 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 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73530?
CVE-2026-73530 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73530?
A fix for CVE-2026-73530 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73530 are linked in the Vendor Advisories panel on this page.

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