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 77% 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%CVSS: 6.5Exploit: 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 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
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 22, 2026

Advisory Details (1)

Auto-updated Jun 18, 2026
No patch confirmed yet.
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 rangeFixed inDependents
@theia/ai-chat—1.71.0—
@theia/ai-chat-ui—1.71.0—
@theia/ai-claude-code—1.71.0—
@theia/ai-code-completion—1.71.0—
@theia/ai-core—1.71.0—
@theia/ai-editor—1.71.0—
@theia/ai-ide—1.71.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 46× 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 105 total refreshes for this CVE.

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

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 76.6% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22551, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-22551

Explore →

Is Your Infrastructure Affected by CVE-2026-22551?

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

Start Free Scan →Browse All CVEs