CVE-2026-14574

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-05. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the PreferenceUtils.merge function in @theia/core recursively merges preference values without rejecting prototype-related keys (__proto__, constructor, prototype). Because this function is invoked by PreferenceServiceImpl.doResolve for every preference resolution across scopes (default, user, workspace, folder), a crafted preference value in a workspace settings file (.theia/settings.json or .vscode/settings.json) can pollute Object.prototype when the user opens the workspace, potentially altering application logic across the Theia process.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 7, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

[Eclipse Theia] Prototype Pollution in @theia/core PreferenceService preference merge (#157) · Issues · Eclipse Projects Security / cve-assignment · GitLab

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/157
generic

[Eclipse Theia] Prototype Pollution in @theia/core PreferenceService preference merge (#567) · Issues · Eclipse Projects Security / vulnerability-reports · GitLab

https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/567

Vendor Advisories for CVE-2026-14574(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 16× in last 7d / 74× 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 121 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-14574?
CVE-2026-14574 is a medium vulnerability published on August 5, 2026. In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the PreferenceUtils.merge function in @theia/core recursively merges preference values without rejecting prototype-related keys (proto, constructor, prototype). Because this function is invoked by PreferenceServiceImpl.doResolve for…
When was CVE-2026-14574 disclosed?
CVE-2026-14574 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14574 actively exploited?
CVE-2026-14574 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 76.7% of all scored CVEs.
What is the CVSS score of CVE-2026-14574?
CVE-2026-14574 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-14574?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14574, 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-2026-14574

Explore →

Is Your Infrastructure Affected by CVE-2026-14574?

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

Start Free Scan →Browse All CVEs