CVE-2026-60009

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH 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 a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

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
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
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] 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 27× in last 7d / 64× 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. 2026-08-20 14:20 UTCGHSA enrichment
  2. 2026-08-20 01:05 UTCEG score recompute
  3. 2026-08-20 01:05 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 13:11 UTCGHSA enrichment
  6. 2026-08-19 01:19 UTCEG score recompute
  7. 2026-08-19 01:19 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-18 13:25 UTCGHSA enrichment
  10. 2026-08-18 01:32 UTCEG score recompute
  11. 2026-08-18 01:32 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 13:40 UTCGHSA enrichment
  14. 2026-08-17 01:48 UTCEG score recompute
  15. 2026-08-17 01:48 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 13:55 UTCEG score recompute
  18. 2026-08-16 13:55 UTCGHSA enrichment
  19. 2026-08-16 02:03 UTCGHSA enrichment
  20. 2026-08-15 14:10 UTCGHSA enrichment
  21. 2026-08-15 02:17 UTCEG score recompute
  22. 2026-08-15 02:17 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 14:25 UTCGHSA enrichment
  25. 2026-08-14 02:32 UTCEG score recompute
Show 39 more
  1. 2026-08-14 02:32 UTCGHSA enrichment
  2. 2026-08-13 22:00 UTCEPSS rescore
  3. 2026-08-13 14:40 UTCGHSA enrichment
  4. 2026-08-13 02:47 UTCGHSA enrichment
  5. 2026-08-12 14:55 UTCEG score recompute
  6. 2026-08-12 14:55 UTCGHSA enrichment
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-12 03:02 UTCGHSA enrichment
  9. 2026-08-11 15:10 UTCEG score recompute
  10. 2026-08-11 15:09 UTCGHSA enrichment
  11. 2026-08-11 03:14 UTCEG score recompute
  12. 2026-08-11 03:14 UTCGHSA enrichment
  13. 2026-08-11 00:00 UTCEPSS rescore
  14. 2026-08-10 15:22 UTCGHSA enrichment
  15. 2026-08-10 03:29 UTCGHSA enrichment
  16. 2026-08-09 15:37 UTCEG score recompute
  17. 2026-08-09 15:37 UTCGHSA enrichment
  18. 2026-08-09 13:46 UTCEPSS rescore
  19. 2026-08-09 03:45 UTCEG score recompute
  20. 2026-08-09 03:45 UTCGHSA enrichment
  21. 2026-08-08 16:37 UTCEPSS rescore
  22. 2026-08-08 15:53 UTCGHSA enrichment
  23. 2026-08-08 04:00 UTCEG score recompute
  24. 2026-08-08 04:00 UTCGHSA enrichment
  25. 2026-08-07 16:08 UTCGHSA enrichment
  26. 2026-08-07 15:34 UTCGHSA enrichment
  27. 2026-08-07 03:42 UTCGHSA enrichment
  28. 2026-08-06 15:49 UTCEG score recompute
  29. 2026-08-06 15:49 UTCGHSA enrichment
  30. 2026-08-06 13:47 UTCEPSS rescore
  31. 2026-08-06 13:12 UTCGHSA enrichment
  32. 2026-08-06 01:20 UTCGHSA enrichment
  33. 2026-08-05 13:28 UTCEG score recompute
  34. 2026-08-05 13:28 UTCGHSA enrichment
  35. 2026-08-05 13:08 UTCEG score recompute
  36. 2026-08-05 13:08 UTCGHSA enrichment
  37. 2026-08-05 11:26 UTCEG score recompute
  38. 2026-08-05 11:06 UTCEG score recompute
  39. 2026-08-05 11:05 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 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-2026-60009 actively exploited?
CVE-2026-60009 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 74.8% of all scored CVEs.
What is the CVSS score of CVE-2026-60009?
CVE-2026-60009 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-60009?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-60009, 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

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