CVE-2026-22551

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 76% of all CVEs by exploit prediction. 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, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Eclipse Theia versions prior to 1.71.0, the AI chat rendered Markdown image tags from AI responses, triggering HTTP requests to arbitrary external URLs without restriction. Combined with prompt injection in a malicious workspace, an attacker could induce the AI agent to construct image URLs encoding sensitive information from the workspace or conversation context, exfiltrating it to attacker-controlled servers. The workspace trust enforcement introduced in v1.71.0 mitigates the documented attack chain by disabling AI features in untrusted workspaces.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100

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%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.3%
EPSS %ILE
22nd
KEV
Not listed

Published

June 18, 2026

Last Modified

June 22, 2026

Advisory Details (1)

Auto-updated Jun 18, 2026
Patch available.
generic

[Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat (#115) · Issues · Eclipse Projects Security / cve-assignment · GitLab

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/115

Vendor Advisories for CVE-2026-22551(1)

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

Affected Packages

(7 across 1 ecosystem)
npm(7)
PackageVulnerable rangeFix by version rangeDependents
@theia/ai-chat—
  • every version up to 1.71.0: fixed in 1.71.0
—
@theia/ai-chat-ui—
  • every version up to 1.71.0: fixed in 1.71.0
—
@theia/ai-claude-code—
  • every version up to 1.71.0: fixed in 1.71.0
—
@theia/ai-code-completion—
  • every version up to 1.71.0: fixed in 1.71.0
—
@theia/ai-core—
  • every version up to 1.71.0: fixed in 1.71.0
—
@theia/ai-editor—
  • every version up to 1.71.0: fixed in 1.71.0
—
@theia/ai-ide—
  • every version up to 1.71.0: fixed in 1.71.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 148 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Same product

2 shown

npm:@theia/ai-ide · npm:@theia/ai-chat

Frequently asked(5)

What is CVE-2026-22551?
CVE-2026-22551 is a medium vulnerability published on June 18, 2026. In Eclipse Theia versions prior to 1.71.0, the AI chat rendered Markdown image tags from AI responses, triggering HTTP requests to arbitrary external URLs without restriction. Combined with prompt injection in a malicious workspace, an attacker could induce the AI agent to construct image URLs…
When was CVE-2026-22551 disclosed?
CVE-2026-22551 was first published on June 18, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22551 actively exploited?
CVE-2026-22551 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-22551?
CVE-2026-22551 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-22551?
A fix for CVE-2026-22551 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-22551 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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