CVE-2026-19884

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (8th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Eclipse Theia versions up to and including 1.69.0, opening a folder starts source control integration without requiring the user to trust the folder first. This affects applications built on Theia that include the git integration, such as the Theia IDE. Both Theia's own @theia/git extension and the builtin VS Code git extension run git commands such as git status as soon as a repository is detected. Since git honors repository-local configuration, a folder containing an attacker-controlled .git/config with core.fsmonitor (or a comparable hook-like setting) causes the configured command to be executed. The configuration can be delivered by burying a bare repository inside a regular repository (OVE-20210718-0001), so cloning an attacker-supplied repository and opening it in a Theia-based application is sufficient to execute arbitrary commands with the privileges of the user, without any confirmation prompt.

As of 1.70.0, plugins that declare capabilities.untrustedWorkspaces.supported: false, which includes the builtin git extension, are no longer loaded or activated in an untrusted workspace, and the deprecated @theia/git extension has been removed, so no git command is executed against an untrusted folder.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

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 14, 2026

Last Modified

August 18, 2026

Advisory Details (5)

Auto-updated Aug 14, 2026
Patch available. Sources: github_pr.
generic

[Eclipse Theia] Arbitrary code execution via untrusted git repository configuration (#231) · Issues · Eclipse Projects Security / cve-assignment · GitLab

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/231
generic

[Eclipse Theia] Git local configuration leading to Arbitrary Code Execution in Theia IDE upon opening attacker's repo/folder (#175) · Issues · Eclipse Projects Security / vulnerability-reports · GitLab

https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/175
github_pr Patch Available

chore: remove deprecated @theia/git extension code

Patch available: eclipse-theia/theia v1.70.0 (PR #17148 merged 2026-03-11)

https://github.com/eclipse-theia/theia/pull/17148
github_pr Patch Available

feat: enforce workspace trust in extension/plugin system

Patch available: eclipse-theia/theia v1.70.0 (PR #17098 merged 2026-03-17)

https://github.com/eclipse-theia/theia/pull/17098
github_pr Patch Available

feat(workspace): implement workspace trust dialog and management

Patch available: eclipse-theia/theia v1.68.0 (PR #16809 merged 2026-01-23)

https://github.com/eclipse-theia/theia/pull/16809

Vendor Advisories for CVE-2026-19884(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 93× 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 186 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-19884?
CVE-2026-19884 is a high vulnerability published on August 14, 2026. In Eclipse Theia versions up to and including 1.69.0, opening a folder starts source control integration without requiring the user to trust the folder first. This affects applications built on Theia that include the git integration, such as the Theia IDE. Both Theia's own @theia/git extension and…
When was CVE-2026-19884 disclosed?
CVE-2026-19884 was first published on August 14, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19884 actively exploited?
CVE-2026-19884 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19884?
CVE-2026-19884 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-19884?
A fix for CVE-2026-19884 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-19884 are linked in the Vendor Advisories panel on this page.

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