CVE-2026-17621

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-09-04. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

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

IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
19th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (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

September 4, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Sep 4, 2026
No patch confirmed yet.
generic

Security Bulletin: Langflow OSS is affected by arbitrary file read due to path traversal vulnerabilities in file and knowledge base components

https://www.ibm.com/support/pages/node/7286293

Vendor Advisories for CVE-2026-17621(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 18× in last 7d / 77× 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. 2026-10-05 04:39 UTCEG score recompute
  2. 2026-10-05 04:39 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 02:31 UTCEG score recompute
  5. 2026-10-04 02:31 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 00:22 UTCEG score recompute
  8. 2026-10-03 00:22 UTCGHSA enrichment
  9. 2026-10-01 21:02 UTCEG score recompute
  10. 2026-10-01 21:02 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-09-30 18:54 UTCEG score recompute
  13. 2026-09-30 18:54 UTCGHSA enrichment
  14. 2026-09-30 15:02 UTCEPSS rescore
  15. 2026-09-29 15:20 UTCEPSS rescore
  16. 2026-09-29 11:03 UTCEG score recompute
  17. 2026-09-29 11:03 UTCGHSA enrichment
  18. 2026-09-28 13:51 UTCEPSS rescore
  19. 2026-09-28 08:43 UTCEG score recompute
  20. 2026-09-28 08:43 UTCGHSA enrichment
  21. 2026-09-27 13:47 UTCEPSS rescore
  22. 2026-09-27 06:35 UTCEG score recompute
  23. 2026-09-27 06:35 UTCGHSA enrichment
  24. 2026-09-26 15:58 UTCEPSS rescore
  25. 2026-09-26 04:20 UTCEG score recompute
Show 55 more
  1. 2026-09-26 04:20 UTCGHSA enrichment
  2. 2026-09-25 02:11 UTCEG score recompute
  3. 2026-09-25 02:11 UTCGHSA enrichment
  4. 2026-09-24 00:03 UTCEG score recompute
  5. 2026-09-24 00:03 UTCGHSA enrichment
  6. 2026-09-22 21:54 UTCEG score recompute
  7. 2026-09-22 21:54 UTCGHSA enrichment
  8. 2026-09-21 19:46 UTCEG score recompute
  9. 2026-09-21 19:46 UTCGHSA enrichment
  10. 2026-09-20 17:38 UTCEG score recompute
  11. 2026-09-20 17:38 UTCGHSA enrichment
  12. 2026-09-19 15:25 UTCEG score recompute
  13. 2026-09-19 15:24 UTCGHSA enrichment
  14. 2026-09-18 19:27 UTCEPSS rescore
  15. 2026-09-18 13:16 UTCEG score recompute
  16. 2026-09-18 13:16 UTCGHSA enrichment
  17. 2026-09-17 11:08 UTCEG score recompute
  18. 2026-09-17 11:08 UTCGHSA enrichment
  19. 2026-09-16 14:07 UTCEPSS rescore
  20. 2026-09-16 09:00 UTCEG score recompute
  21. 2026-09-16 09:00 UTCGHSA enrichment
  22. 2026-09-16 05:14 UTCEPSS rescore
  23. 2026-09-15 05:53 UTCEG score recompute
  24. 2026-09-15 05:53 UTCGHSA enrichment
  25. 2026-09-14 03:45 UTCEG score recompute
  26. 2026-09-14 03:45 UTCGHSA enrichment
  27. 2026-09-13 16:46 UTCEPSS rescore
  28. 2026-09-13 01:37 UTCEG score recompute
  29. 2026-09-13 01:37 UTCGHSA enrichment
  30. 2026-09-12 15:00 UTCEPSS rescore
  31. 2026-09-11 23:29 UTCEG score recompute
  32. 2026-09-11 23:29 UTCGHSA enrichment
  33. 2026-09-11 14:52 UTCEPSS rescore
  34. 2026-09-11 09:36 UTCEPSS rescore
  35. 2026-09-10 21:21 UTCGHSA enrichment
  36. 2026-09-10 21:06 UTCEG score recompute
  37. 2026-09-10 21:06 UTCGHSA enrichment
  38. 2026-09-10 17:22 UTCEG score recompute
  39. 2026-09-10 17:22 UTCGHSA enrichment
  40. 2026-09-10 09:34 UTCEPSS rescore
  41. 2026-09-09 15:11 UTCEG score recompute
  42. 2026-09-09 15:11 UTCGHSA enrichment
  43. 2026-09-08 22:00 UTCEPSS rescore
  44. 2026-09-08 15:14 UTCGHSA enrichment
  45. 2026-09-07 23:51 UTCEG score recompute
  46. 2026-09-07 23:50 UTCGHSA enrichment
  47. 2026-09-07 16:01 UTCEPSS rescore
  48. 2026-09-06 21:43 UTCEG score recompute
  49. 2026-09-06 21:43 UTCGHSA enrichment
  50. 2026-09-06 13:47 UTCEPSS rescore
  51. 2026-09-05 19:35 UTCEG score recompute
  52. 2026-09-05 19:35 UTCGHSA enrichment
  53. 2026-09-04 17:28 UTCEG score recompute
  54. 2026-09-04 16:39 UTCEG score recompute
  55. 2026-09-04 16:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17621?
CVE-2026-17621 is a medium vulnerability published on September 4, 2026. IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system.
When was CVE-2026-17621 disclosed?
CVE-2026-17621 was first published on September 4, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17621 actively exploited?
CVE-2026-17621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-17621?
CVE-2026-17621 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-17621?
No fix for CVE-2026-17621 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-17621 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-17621

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