CVE-2026-18904

HIGHNVD 8.28.2—
EchelonGraph scoreHIGH confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-29. NVD baseline CVSS 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

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

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers.

CVSS v3
8.2
EG Score
8.2(high)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
No patch confirmed yet.
generic

Security Bulletin: Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

https://www.ibm.com/support/pages/node/7284579

Vendor Advisories for CVE-2026-18904(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 24× in last 7d / 96× 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. 2026-09-20 22:01 UTCEG score recompute
  2. 2026-09-20 22:01 UTCGHSA enrichment
  3. 2026-09-20 10:42 UTCGHSA enrichment
  4. 2026-09-19 23:13 UTCEG score recompute
  5. 2026-09-19 23:13 UTCGHSA enrichment
  6. 2026-09-19 11:54 UTCGHSA enrichment
  7. 2026-09-19 00:35 UTCEG score recompute
  8. 2026-09-19 00:35 UTCGHSA enrichment
  9. 2026-09-18 19:27 UTCEPSS rescore
  10. 2026-09-18 13:17 UTCGHSA enrichment
  11. 2026-09-18 01:59 UTCEG score recompute
  12. 2026-09-18 01:59 UTCGHSA enrichment
  13. 2026-09-17 14:40 UTCGHSA enrichment
  14. 2026-09-17 03:21 UTCGHSA enrichment
  15. 2026-09-16 16:02 UTCEG score recompute
  16. 2026-09-16 16:02 UTCGHSA enrichment
  17. 2026-09-16 14:07 UTCEPSS rescore
  18. 2026-09-16 05:14 UTCEPSS rescore
  19. 2026-09-16 04:44 UTCGHSA enrichment
  20. 2026-09-15 17:25 UTCGHSA enrichment
  21. 2026-09-15 06:06 UTCEG score recompute
  22. 2026-09-15 06:06 UTCGHSA enrichment
  23. 2026-09-14 18:45 UTCGHSA enrichment
  24. 2026-09-14 06:43 UTCGHSA enrichment
  25. 2026-09-13 19:24 UTCEG score recompute
Show 71 more
  1. 2026-09-13 19:24 UTCGHSA enrichment
  2. 2026-09-13 16:46 UTCEPSS rescore
  3. 2026-09-13 08:05 UTCGHSA enrichment
  4. 2026-09-12 20:47 UTCEG score recompute
  5. 2026-09-12 20:47 UTCGHSA enrichment
  6. 2026-09-12 15:00 UTCEPSS rescore
  7. 2026-09-12 09:28 UTCGHSA enrichment
  8. 2026-09-11 22:10 UTCEG score recompute
  9. 2026-09-11 22:10 UTCGHSA enrichment
  10. 2026-09-11 14:52 UTCEPSS rescore
  11. 2026-09-11 10:50 UTCEG score recompute
  12. 2026-09-11 10:50 UTCGHSA enrichment
  13. 2026-09-11 09:36 UTCEPSS rescore
  14. 2026-09-10 23:04 UTCGHSA enrichment
  15. 2026-09-10 11:45 UTCEG score recompute
  16. 2026-09-10 11:45 UTCGHSA enrichment
  17. 2026-09-10 09:34 UTCEPSS rescore
  18. 2026-09-09 23:52 UTCGHSA enrichment
  19. 2026-09-09 11:44 UTCGHSA enrichment
  20. 2026-09-09 00:26 UTCEG score recompute
  21. 2026-09-09 00:26 UTCGHSA enrichment
  22. 2026-09-08 22:00 UTCEPSS rescore
  23. 2026-09-08 02:19 UTCEG score recompute
  24. 2026-09-08 02:19 UTCGHSA enrichment
  25. 2026-09-07 16:01 UTCEPSS rescore
  26. 2026-09-07 15:01 UTCGHSA enrichment
  27. 2026-09-07 02:33 UTCGHSA enrichment
  28. 2026-09-06 15:11 UTCEG score recompute
  29. 2026-09-06 15:10 UTCGHSA enrichment
  30. 2026-09-06 13:47 UTCEPSS rescore
  31. 2026-09-06 03:50 UTCGHSA enrichment
  32. 2026-09-05 16:31 UTCEG score recompute
  33. 2026-09-05 16:31 UTCGHSA enrichment
  34. 2026-09-05 05:11 UTCGHSA enrichment
  35. 2026-09-04 17:52 UTCEG score recompute
  36. 2026-09-04 17:52 UTCGHSA enrichment
  37. 2026-09-04 06:30 UTCEG score recompute
  38. 2026-09-04 06:30 UTCGHSA enrichment
  39. 2026-09-04 05:06 UTCEPSS rescore
  40. 2026-09-03 19:05 UTCGHSA enrichment
  41. 2026-09-03 07:45 UTCGHSA enrichment
  42. 2026-09-02 20:23 UTCEG score recompute
  43. 2026-09-02 20:23 UTCGHSA enrichment
  44. 2026-09-02 14:11 UTCEPSS rescore
  45. 2026-09-02 07:55 UTCGHSA enrichment
  46. 2026-09-01 20:36 UTCEG score recompute
  47. 2026-09-01 20:35 UTCGHSA enrichment
  48. 2026-09-01 13:53 UTCEPSS rescore
  49. 2026-09-01 09:15 UTCEG score recompute
  50. 2026-09-01 09:14 UTCGHSA enrichment
  51. 2026-09-01 04:39 UTCEPSS rescore
  52. 2026-08-31 21:55 UTCEG score recompute
  53. 2026-08-31 21:55 UTCGHSA enrichment
  54. 2026-08-31 19:30 UTCEG score recompute
  55. 2026-08-31 19:29 UTCGHSA enrichment
  56. 2026-08-31 18:56 UTCEG score recompute
  57. 2026-08-31 18:56 UTCGHSA enrichment
  58. 2026-08-31 18:37 UTCGHSA enrichment
  59. 2026-08-31 07:17 UTCGHSA enrichment
  60. 2026-08-30 19:58 UTCEG score recompute
  61. 2026-08-30 19:58 UTCGHSA enrichment
  62. 2026-08-30 19:17 UTCEPSS rescore
  63. 2026-08-30 08:38 UTCEG score recompute
  64. 2026-08-30 08:38 UTCGHSA enrichment
  65. 2026-08-30 01:22 UTCEPSS rescore
  66. 2026-08-29 21:18 UTCGHSA enrichment
  67. 2026-08-29 10:00 UTCEG score recompute
  68. 2026-08-29 09:59 UTCGHSA enrichment
  69. 2026-08-28 22:41 UTCEG score recompute
  70. 2026-08-28 22:01 UTCEG score recompute
  71. 2026-08-28 21:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18904?
CVE-2026-18904 is a high vulnerability published on August 28, 2026. IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers.
When was CVE-2026-18904 disclosed?
CVE-2026-18904 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18904 actively exploited?
CVE-2026-18904 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 76.1% of all scored CVEs.
What is the CVSS score of CVE-2026-18904?
CVE-2026-18904 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-18904?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18904, 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-2026-18904

Explore →

Is Your Infrastructure Affected by CVE-2026-18904?

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

Start Free Scan →Browse All CVEs