CVE-2026-12821

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-06-22. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

A vulnerability was determined in FlowiseAI Flowise up to 3.1.2. The impacted element is an unknown function of the file packages/components/nodes/documentloaders/S3/S3.ts of the component S3 Document Loader. Executing a manipulation can lead to path traversal. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

June 22, 2026

Last Modified

June 22, 2026

Advisory Details (1)

Auto-updated Jun 22, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

softwareoverflow/flowise_s3_loader_object_key_path_traversal_vulndb.md at main · dxz0069/softwareoverflow · GitHub

https://github.com/dxz0069/softwareoverflow/blob/main/flowise_s3_loader_object_key_path_traversal_vulndb.md

Vendor Advisories for CVE-2026-12821(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 6× in last 7d / 47× 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 164 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12821?
CVE-2026-12821 is a medium vulnerability published on June 22, 2026. A vulnerability was determined in FlowiseAI Flowise up to 3.1.2. The impacted element is an unknown function of the file packages/components/nodes/documentloaders/S3/S3.ts of the component S3 Document Loader. Executing a manipulation can lead to path traversal. It is possible to launch the attack…
When was CVE-2026-12821 disclosed?
CVE-2026-12821 was first published in the National Vulnerability Database on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12821 actively exploited?
CVE-2026-12821 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 59.1% of all scored CVEs.
What is the CVSS score of CVE-2026-12821?
CVE-2026-12821 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-12821?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12821, 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

Explore the affected products and dependency analysis for CVE-2026-12821

Explore →

Is Your Infrastructure Affected by CVE-2026-12821?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs