CVE-2026-67426

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 76% 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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.7, the standalone flyto-verification service in src/core/verification_service.py exposes unauthenticated POST /run on 0.0.0.0:8344 and uses client-supplied callback_url for an outbound POST with X-Internal-Key: $FLYTO_RUNNER_SECRET while bypassing target_allowed, allowing unauthenticated SSRF and runner secret exfiltration. This issue is fixed in version 2.26.7.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

July 29, 2026

Last Modified

July 30, 2026

Advisory Details (3)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github Patch Available🟡 PoC Available

Unauthenticated flyto-verification /run: callback_url SSRF and internal runner-secret exfiltration · Advisory · flytohub/flyto-core · GitHub

https://github.com/flytohub/flyto-core/security/advisories/GHSA-jx74-cqjv-2c67
github_release Patch Available

v2.26.7 — Security release (SSRF hardening)

Patch available: flytohub/flyto-core v2.26.7

https://github.com/flytohub/flyto-core/releases/tag/v2.26.7
github_commit Patch Available

commit 0a0a528520ec (flytohub/flyto-core)

Patch available: flytohub/flyto-core v2.26.7 (contains commit 0a0a528520ec)

https://github.com/flytohub/flyto-core/commit/0a0a528520ec18f5a21f1ddf858a71cc1edfb6e9

Vendor Advisories for CVE-2026-67426(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
flyto-core1.0.0 ... 2.9.0 (216 versions)2.26.7—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 48× 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. 2026-09-18 19:42 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 01:39 UTCEG score recompute
  4. 2026-09-17 01:35 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:47 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 07:49 UTCEG score recompute
  9. 2026-09-13 17:37 UTCEG score recompute
  10. 2026-09-12 18:17 UTCEG score recompute
  11. 2026-09-11 15:06 UTCEG score recompute
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 09:37 UTCEPSS rescore
  14. 2026-09-10 10:10 UTCEG score recompute
  15. 2026-09-09 07:46 UTCEG score recompute
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-07 20:45 UTCEG score recompute
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-06 17:22 UTCEG score recompute
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-05 19:04 UTCEG score recompute
  22. 2026-09-05 15:31 UTCEPSS rescore
  23. 2026-09-04 16:18 UTCEG score recompute
  24. 2026-09-04 11:54 UTCEG score recompute
  25. 2026-09-04 05:07 UTCEPSS rescore
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  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-01 22:46 UTCEG score recompute
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 04:40 UTCEPSS rescore
  5. 2026-08-30 21:14 UTCEG score recompute
  6. 2026-08-30 19:17 UTCEPSS rescore
  7. 2026-08-30 03:36 UTCEG score recompute
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-29 23:12 UTCEG score recompute
  10. 2026-08-28 21:42 UTCEPSS rescore
  11. 2026-08-27 20:55 UTCEG score recompute
  12. 2026-08-26 19:37 UTCEG score recompute
  13. 2026-08-26 14:47 UTCEPSS rescore
  14. 2026-08-25 13:53 UTCEG score recompute
  15. 2026-08-25 13:49 UTCEPSS rescore
  16. 2026-08-24 15:47 UTCEG score recompute
  17. 2026-08-24 11:13 UTCEG score recompute
  18. 2026-08-23 04:05 UTCEG score recompute
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-22 01:41 UTCEG score recompute
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-20 23:14 UTCEG score recompute
  23. 2026-08-20 22:56 UTCEPSS rescore
  24. 2026-08-19 19:38 UTCEG score recompute
  25. 2026-08-19 17:04 UTCEPSS rescore
  26. 2026-08-18 18:34 UTCEG score recompute
  27. 2026-08-18 13:48 UTCEPSS rescore
  28. 2026-08-17 17:32 UTCEG score recompute
  29. 2026-08-17 13:47 UTCEPSS rescore
  30. 2026-08-16 15:08 UTCEG score recompute
  31. 2026-08-16 14:56 UTCEPSS rescore
  32. 2026-08-16 06:20 UTCEG score recompute
  33. 2026-08-15 03:54 UTCEG score recompute
  34. 2026-08-15 01:30 UTCEPSS rescore
  35. 2026-08-14 01:30 UTCEG score recompute
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-12 14:11 UTCEG score recompute
  38. 2026-08-12 13:51 UTCEPSS rescore
  39. 2026-08-11 16:11 UTCEG score recompute
  40. 2026-08-11 02:59 UTCEG score recompute
  41. 2026-08-11 00:00 UTCEPSS rescore
  42. 2026-08-09 15:47 UTCEG score recompute
  43. 2026-08-09 13:47 UTCEPSS rescore
  44. 2026-08-08 17:48 UTCEG score recompute
  45. 2026-08-08 16:37 UTCEPSS rescore
  46. 2026-08-07 19:48 UTCEG score recompute
  47. 2026-08-06 17:24 UTCEG score recompute
  48. 2026-08-06 13:47 UTCEPSS rescore
  49. 2026-08-05 19:23 UTCEG score recompute
  50. 2026-08-05 19:17 UTCEPSS rescore
  51. 2026-08-05 19:17 UTCEPSS rescore
  52. 2026-08-04 16:55 UTCEG score recompute
  53. 2026-08-04 15:10 UTCEPSS rescore
  54. 2026-08-04 12:31 UTCEG score recompute
  55. 2026-08-04 10:39 UTCEPSS rescore
  56. 2026-08-03 13:17 UTCEG score recompute
  57. 2026-08-03 10:36 UTCEPSS rescore
  58. 2026-08-02 06:28 UTCEG score recompute
  59. 2026-08-02 02:27 UTCEPSS rescore
  60. 2026-08-01 08:26 UTCEG score recompute
  61. 2026-08-01 04:16 UTCEPSS rescore
  62. 2026-07-30 16:44 UTCEG score recompute
  63. 2026-07-30 16:28 UTCEPSS rescore
  64. 2026-07-30 09:34 UTCEG score recompute
  65. 2026-07-29 19:32 UTCEG score recompute
  66. 2026-07-29 18:53 UTCEG score recompute
  67. 2026-07-29 18:52 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-67426?
CVE-2026-67426 is a critical vulnerability published on July 29, 2026. Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.7, the standalone flyto-verification service in src/core/verificationservice.py exposes unauthenticated POST /run on 0.0.0.0:8344 and uses client-supplied callbackurl for an outbound POST with X-Internal-Key:…
When was CVE-2026-67426 disclosed?
CVE-2026-67426 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67426 actively exploited?
CVE-2026-67426 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 76.2% of all scored CVEs.
What is the CVSS score of CVE-2026-67426?
CVE-2026-67426 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-67426?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67426, 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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