CVE-2026-23538

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 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(high)
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
51.1%
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 13× in last 7d / 19× 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. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:07 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-21 15:24 UTCEPSS rescore
  7. 2026-07-20 17:08 UTCEPSS rescore
  8. 2026-07-19 14:31 UTCEPSS rescore
  9. 2026-07-19 14:31 UTCEPSS rescore
  10. 2026-07-19 02:29 UTCEPSS rescore
  11. 2026-07-19 02:28 UTCEPSS rescore
  12. 2026-07-18 10:04 UTCEPSS rescore
  13. 2026-07-18 10:04 UTCEPSS rescore
  14. 2026-07-16 23:36 UTCGHSA enrichment
  15. 2026-07-16 17:03 UTCEPSS rescore
  16. 2026-07-16 17:03 UTCEPSS rescore
  17. 2026-07-16 12:15 UTCGHSA enrichment
  18. 2026-07-16 00:54 UTCEG score recompute
  19. 2026-07-16 00:53 UTCMITRE cvelistV5first tracked

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 51.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-23538

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