CVE-2026-60009

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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

In Eclipse Theia versions up to and including 1.73.1, the @theia/filesystem backend binds POST /file-upload in every filesystem-enabled deployment. The handler takes an attacker-supplied absolute path from the multipart uri field and calls fs.move(tmp, target, { overwrite: true }) with no workspace confinement and no authentication. In browser (non-Electron) deployments the connection token is enforced only on WebSocket upgrades; the HTTP middleware in @theia/core re-issues the cookie and calls next() without rejecting tokenless HTTP requests. Because multipart/form-data is a CORS-safelisted request type, a cross-origin web page can trigger the write with no preflight and no credentials, resulting in an unauthenticated arbitrary file write outside the workspace to any absolute path the backend process can write. This can escalate to remote code execution, for example by overwriting a startup-executed file such as ~/.bashrc. Electron mode uses a separate ElectronSecurityToken and is not affected via this path.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

August 7, 2026

Advisory Details (2)

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

[Eclipse Theia] unauthenticated cross-origin arbitrary file write, escalate to RCE (#177) · Issues · Eclipse Projects Security / cve-assignment · GitLab

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/177
generic

[Eclipse Theia] unauthenticated cross-origin arbitrary file write, escalate to RCE (#595) · Issues · Eclipse Projects Security / vulnerability-reports · GitLab

https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/595

Vendor Advisories for CVE-2026-60009(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(4)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 85× 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 202 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-60009?
CVE-2026-60009 is a high vulnerability published on August 5, 2026. In Eclipse Theia versions up to and including 1.73.1, the @theia/filesystem backend binds POST /file-upload in every filesystem-enabled deployment. The handler takes an attacker-supplied absolute path from the multipart uri field and calls fs.move(tmp, target, { overwrite: true }) with no workspace…
When was CVE-2026-60009 disclosed?
CVE-2026-60009 was first published 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-2026-60009 actively exploited?
CVE-2026-60009 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-60009?
CVE-2026-60009 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-60009?
No fix for CVE-2026-60009 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-60009 are linked in the Vendor Advisories panel on this page.

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