CVE-2026-23537

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-01. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

A vulnerability has been identified in the Feast Feature Server’s /save-document endpoint that allows an unauthenticated remote attacker to write arbitrary JSON files to the server's filesystem. Although the system attempts to restrict file locations, these protections can be bypassed, enabling an attacker to overwrite vital application configurations or startup scripts. Because this flaw requires no credentials or special privileges, any attacker with network access to the server can potentially compromise the integrity of the system. This could lead to unauthorized system modifications, denial of service through disk exhaustion, or potential remote code execution.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
62%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Sep 7, 2026
Patch available. Sources: redhat, github_pr.
redhat
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23537.json
redhat

2429304 – (CVE-2026-23537) CVE-2026-23537 feast: Unauthenticated Arbitrary File Write

https://bugzilla.redhat.com/show_bug.cgi?id=2429304
redhat Patch Available

CVE-2026-23537 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-23537
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

Vendor Advisories for CVE-2026-23537(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 10× in last 7d / 121× 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 408 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. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 14:27 UTCEG score recompute
  6. 2026-09-06 14:27 UTCGHSA enrichment
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-06 02:25 UTCEG score recompute
  10. 2026-09-06 02:25 UTCGHSA enrichment
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:11 UTCEPSS rescore
  13. 2026-09-01 13:53 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-08-31 00:31 UTCGHSA enrichment
  16. 2026-08-30 20:50 UTCEG score recompute
  17. 2026-08-30 20:50 UTCGHSA enrichment
  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 17:10 UTCGHSA enrichment
  20. 2026-08-30 13:10 UTCEG score recompute
  21. 2026-08-30 13:10 UTCGHSA enrichment
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-28 21:41 UTCEPSS rescore
  24. 2026-08-28 02:47 UTCGHSA enrichment
  25. 2026-08-27 22:27 UTCEG score recompute
Show 75 more
  1. 2026-08-27 22:27 UTCGHSA enrichment
  2. 2026-08-27 14:25 UTCEPSS rescore
  3. 2026-08-26 14:46 UTCEPSS rescore
  4. 2026-08-25 13:48 UTCEPSS rescore
  5. 2026-08-25 04:27 UTCGHSA enrichment
  6. 2026-08-25 00:42 UTCGHSA enrichment
  7. 2026-08-24 21:02 UTCGHSA enrichment
  8. 2026-08-24 14:35 UTCEG score recompute
  9. 2026-08-24 14:35 UTCGHSA enrichment
  10. 2026-08-24 10:54 UTCEG score recompute
  11. 2026-08-24 10:54 UTCGHSA enrichment
  12. 2026-08-24 05:11 UTCGHSA enrichment
  13. 2026-08-24 01:30 UTCGHSA enrichment
  14. 2026-08-23 21:48 UTCGHSA enrichment
  15. 2026-08-23 18:08 UTCGHSA enrichment
  16. 2026-08-23 14:28 UTCGHSA enrichment
  17. 2026-08-23 10:48 UTCGHSA enrichment
  18. 2026-08-23 07:08 UTCGHSA enrichment
  19. 2026-08-23 03:27 UTCEG score recompute
  20. 2026-08-23 03:27 UTCGHSA enrichment
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 23:44 UTCGHSA enrichment
  23. 2026-08-22 20:03 UTCGHSA enrichment
  24. 2026-08-22 14:49 UTCGHSA enrichment
  25. 2026-08-22 11:01 UTCGHSA enrichment
  26. 2026-08-22 07:21 UTCEG score recompute
  27. 2026-08-22 07:21 UTCGHSA enrichment
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-21 22:55 UTCGHSA enrichment
  30. 2026-08-21 19:15 UTCGHSA enrichment
  31. 2026-08-21 15:34 UTCGHSA enrichment
  32. 2026-08-21 11:54 UTCGHSA enrichment
  33. 2026-08-21 08:13 UTCGHSA enrichment
  34. 2026-08-21 04:33 UTCGHSA enrichment
  35. 2026-08-20 23:26 UTCEG score recompute
  36. 2026-08-20 23:26 UTCGHSA enrichment
  37. 2026-08-20 22:55 UTCEPSS rescore
  38. 2026-08-20 19:46 UTCGHSA enrichment
  39. 2026-08-20 16:05 UTCGHSA enrichment
  40. 2026-08-20 12:21 UTCGHSA enrichment
  41. 2026-08-20 08:24 UTCGHSA enrichment
  42. 2026-08-20 04:44 UTCEG score recompute
  43. 2026-08-20 04:44 UTCGHSA enrichment
  44. 2026-08-19 17:03 UTCEPSS rescore
  45. 2026-08-19 16:29 UTCGHSA enrichment
  46. 2026-08-19 12:32 UTCGHSA enrichment
  47. 2026-08-19 08:27 UTCGHSA enrichment
  48. 2026-08-19 04:46 UTCGHSA enrichment
  49. 2026-08-19 00:59 UTCGHSA enrichment
  50. 2026-08-18 21:00 UTCEG score recompute
  51. 2026-08-18 21:00 UTCGHSA enrichment
  52. 2026-08-18 13:48 UTCEPSS rescore
  53. 2026-08-18 04:50 UTCGHSA enrichment
  54. 2026-08-17 23:33 UTCGHSA enrichment
  55. 2026-08-17 15:18 UTCEG score recompute
  56. 2026-08-17 15:18 UTCGHSA enrichment
  57. 2026-08-17 13:47 UTCEPSS rescore
  58. 2026-08-17 11:37 UTCGHSA enrichment
  59. 2026-08-17 07:55 UTCGHSA enrichment
  60. 2026-08-17 04:15 UTCGHSA enrichment
  61. 2026-08-17 00:35 UTCGHSA enrichment
  62. 2026-08-16 20:54 UTCGHSA enrichment
  63. 2026-08-16 17:13 UTCEG score recompute
  64. 2026-08-16 17:13 UTCGHSA enrichment
  65. 2026-08-16 14:56 UTCEPSS rescore
  66. 2026-08-16 13:32 UTCGHSA enrichment
  67. 2026-08-16 09:50 UTCGHSA enrichment
  68. 2026-08-16 06:10 UTCGHSA enrichment
  69. 2026-08-16 02:30 UTCEG score recompute
  70. 2026-08-16 02:30 UTCGHSA enrichment
  71. 2026-08-16 02:14 UTCEPSS rescore
  72. 2026-08-15 22:50 UTCGHSA enrichment
  73. 2026-08-15 19:10 UTCGHSA enrichment
  74. 2026-08-15 15:30 UTCGHSA enrichment
  75. 2026-08-15 11:50 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-23537?
CVE-2026-23537 is a critical vulnerability published on July 1, 2026. A vulnerability has been identified in the Feast Feature Server’s /save-document endpoint that allows an unauthenticated remote attacker to write arbitrary JSON files to the server's filesystem. Although the system attempts to restrict file locations, these protections can be bypassed, enabling an…
When was CVE-2026-23537 disclosed?
CVE-2026-23537 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23537 actively exploited?
CVE-2026-23537 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 37.8% of all scored CVEs.
What is the CVSS score of CVE-2026-23537?
CVE-2026-23537 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-23537?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23537, 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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