CVE-2026-73530

HIGHPre-NVD 7.77.7—
EchelonGraph scoreHIGH confidence

Score 7.7 from GitHub Security Advisory published 2026-08-13. the CNA's CVSS baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
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(high)
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
24%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 14, 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 32× in last 7d / 35× 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. 2026-08-20 17:05 UTCGHSA enrichment
  2. 2026-08-20 05:46 UTCGHSA enrichment
  3. 2026-08-19 18:27 UTCEG score recompute
  4. 2026-08-19 18:27 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 06:26 UTCGHSA enrichment
  7. 2026-08-18 19:07 UTCEG score recompute
  8. 2026-08-18 19:07 UTCGHSA enrichment
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 07:46 UTCGHSA enrichment
  12. 2026-08-17 20:27 UTCEG score recompute
  13. 2026-08-17 20:27 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 09:07 UTCGHSA enrichment
  16. 2026-08-16 21:49 UTCEG score recompute
  17. 2026-08-16 21:49 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 10:29 UTCEG score recompute
  21. 2026-08-16 10:29 UTCGHSA enrichment
  22. 2026-08-16 02:15 UTCEPSS rescore
  23. 2026-08-15 23:11 UTCGHSA enrichment
  24. 2026-08-15 11:52 UTCEG score recompute
  25. 2026-08-15 11:52 UTCGHSA enrichment
Show 10 more
  1. 2026-08-15 01:31 UTCEPSS rescore
  2. 2026-08-15 00:33 UTCGHSA enrichment
  3. 2026-08-14 13:14 UTCEG score recompute
  4. 2026-08-14 13:14 UTCGHSA enrichment
  5. 2026-08-14 07:41 UTCEG score recompute
  6. 2026-08-14 07:41 UTCGHSA enrichment
  7. 2026-08-13 20:22 UTCEG score recompute
  8. 2026-08-13 19:47 UTCEG score recompute
  9. 2026-08-13 19:23 UTCEG score recompute
  10. 2026-08-13 19:21 UTCMITRE cvelistV5first tracked

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 August 14, 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 76.0% of all scored CVEs.
What is the CVSS score of CVE-2026-73530?
CVE-2026-73530 has a CVSS v4.0 base score of 7.7 (CNA self-assessment; NVD's own analysis pending).
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.

Dependency Blast Radius

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