CVE-2026-23538

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-16. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

A vulnerability was identified in the Feast Feature Server's /ws/chat endpoint that allows remote attackers to establish persistent WebSocket connections without any authentication. By opening a large number of simultaneous connections, an attacker can exhaust server resources—such as memory, CPU, and file descriptors—leading to a complete denial of service for legitimate users.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

July 16, 2026

Last Modified

July 16, 2026

Advisory Details (3)

Auto-updated Jul 16, 2026
Patch available. Sources: redhat, github_pr.
github_pr

feat: Feast updates for simplicity

Fix merged in red-hat-data-services/feast PR #192 on 2026-01-16 — awaiting tagged release

https://github.com/red-hat-data-services/feast/pull/192
redhat

2429311 – (CVE-2026-23538) CVE-2026-23538 feast: Resource exhaustion via WebSocket endpoint

https://bugzilla.redhat.com/show_bug.cgi?id=2429311
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-23538

Vendor Advisories for CVE-2026-23538(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 11× in last 7d / 82× 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 175 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-23538?
CVE-2026-23538 is a high vulnerability published on July 16, 2026. A vulnerability was identified in the Feast Feature Server's /ws/chat endpoint that allows remote attackers to establish persistent WebSocket connections without any authentication. By opening a large number of simultaneous connections, an attacker can exhaust server resources—such as memory, CPU,…
When was CVE-2026-23538 disclosed?
CVE-2026-23538 was first published in the National Vulnerability Database on July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23538 actively exploited?
CVE-2026-23538 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 42.6% of all scored CVEs.
What is the CVSS score of CVE-2026-23538?
CVE-2026-23538 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-23538?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23538, 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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