CVE-2026-73222

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 84% 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, secondary
Elevated
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: Elevated riskExposed: 0

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

Claude Code Templates is a CLI tool for configuring and monitoring Claude Code. Prior to 1.29.4, the Claude Code Studio server launched by the --studio option in cli-tool/src/sandbox-server.js binds to all interfaces on port 3444, permits cross-origin requests, and requires no authentication. The POST /api/execute endpoint passes the prompt request-body field to executeLocalTask(), and POST /api/install-agent passes the agentName request-body field to a child process. The same unsafe agent field path is reachable from /api/execute through checkAndInstallAgent(). These attacker-controlled values reach child_process.spawn() with shell execution enabled, causing Node.js to construct a shell command in which metacharacters are interpreted. An attacker who can reach the port directly, or who convinces a developer running Studio to visit a malicious website, can execute arbitrary operating-system commands with the developer's privileges and compromise source code, credentials, and local data. This issue is fixed in version 1.29.4.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 11, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 11, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

claude-code-templates/CHANGELOG.md at main · davila7/claude-code-templates · GitHub

https://github.com/davila7/claude-code-templates/blob/main/CHANGELOG.md
github_commit

commit bc4618b07232 (davila7/claude-code-templates)

Fix landed in davila7/claude-code-templates commit bc4618b07232 — awaiting tagged release

https://github.com/davila7/claude-code-templates/commit/bc4618b07232633c1c0aac12a43e436268d31783
github Patch Available🟡 PoC Available

Unauthenticated OS command injection (RCE) in Claude Code Studio server (--studio) · Advisory · davila7/claude-code-templates · GitHub

https://github.com/davila7/claude-code-templates/security/advisories/GHSA-79wm-x847-7cvg

Vendor Advisories for CVE-2026-73222(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
claude-code-templates—1.29.4—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 49× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-19 16:55 UTCEG score recompute
  3. 2026-09-19 03:24 UTCEG score recompute
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 02:20 UTCEG score recompute
  6. 2026-09-17 00:26 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 10:53 UTCEG score recompute
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 06:25 UTCEG score recompute
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-14 04:40 UTCEG score recompute
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  14. 2026-09-12 15:02 UTCEPSS rescore
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  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 13:57 UTCEG score recompute
  18. 2026-09-10 09:48 UTCEG score recompute
  19. 2026-09-10 09:35 UTCEPSS rescore
  20. 2026-09-09 05:24 UTCEG score recompute
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-07 18:32 UTCEG score recompute
  23. 2026-09-06 14:33 UTCEG score recompute
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-06 02:01 UTCEG score recompute
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  1. 2026-09-05 00:53 UTCEG score recompute
  2. 2026-09-04 08:04 UTCEG score recompute
  3. 2026-09-04 05:07 UTCEPSS rescore
  4. 2026-09-02 23:48 UTCEG score recompute
  5. 2026-09-02 14:12 UTCEPSS rescore
  6. 2026-09-02 01:52 UTCEG score recompute
  7. 2026-09-01 13:54 UTCEPSS rescore
  8. 2026-09-01 13:18 UTCEG score recompute
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-09-01 04:40 UTCEPSS rescore
  11. 2026-08-30 22:40 UTCEG score recompute
  12. 2026-08-30 19:18 UTCEPSS rescore
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 10:07 UTCEG score recompute
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-29 09:03 UTCEG score recompute
  17. 2026-08-28 21:42 UTCEPSS rescore
  18. 2026-08-27 19:57 UTCEG score recompute
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 18:51 UTCEG score recompute
  21. 2026-08-26 14:47 UTCEPSS rescore
  22. 2026-08-24 14:54 UTCEG score recompute
  23. 2026-08-23 01:15 UTCEG score recompute
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 00:12 UTCEG score recompute
  26. 2026-08-21 23:49 UTCEPSS rescore
  27. 2026-08-20 23:06 UTCEG score recompute
  28. 2026-08-20 22:56 UTCEPSS rescore
  29. 2026-08-19 22:02 UTCEG score recompute
  30. 2026-08-19 17:04 UTCEPSS rescore
  31. 2026-08-18 20:58 UTCEG score recompute
  32. 2026-08-18 13:49 UTCEPSS rescore
  33. 2026-08-18 13:49 UTCEPSS rescore
  34. 2026-08-17 19:52 UTCEG score recompute
  35. 2026-08-17 13:47 UTCEPSS rescore
  36. 2026-08-16 18:49 UTCEG score recompute
  37. 2026-08-16 14:56 UTCEPSS rescore
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 06:11 UTCEG score recompute
  40. 2026-08-16 02:15 UTCEPSS rescore
  41. 2026-08-15 05:07 UTCEG score recompute
  42. 2026-08-15 01:31 UTCEPSS rescore
  43. 2026-08-14 04:00 UTCEG score recompute
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-13 15:28 UTCEG score recompute
  46. 2026-08-13 14:25 UTCEG score recompute
  47. 2026-08-12 20:41 UTCEG score recompute
  48. 2026-08-12 13:51 UTCEPSS rescore
  49. 2026-08-11 19:37 UTCEG score recompute
  50. 2026-08-11 18:40 UTCEG score recompute
  51. 2026-08-11 18:40 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73222?
CVE-2026-73222 is a high vulnerability published on August 11, 2026. Claude Code Templates is a CLI tool for configuring and monitoring Claude Code. Prior to 1.29.4, the Claude Code Studio server launched by the --studio option in cli-tool/src/sandbox-server.js binds to all interfaces on port 3444, permits cross-origin requests, and requires no authentication. The…
When was CVE-2026-73222 disclosed?
CVE-2026-73222 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73222 actively exploited?
CVE-2026-73222 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 83.7% of all scored CVEs.
What is the CVSS score of CVE-2026-73222?
CVE-2026-73222 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-73222?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73222, 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-2026-73222

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