CVE-2026-6942

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-23. NVD baseline CVSS 8.8; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

radare2-mcp version 1.6.0 and earlier contains an os command injection vulnerability that allows remote attackers to execute arbitrary commands by bypassing the command filter through shell metacharacters in user-controlled input passed to r2_cmd_str(). Attackers can inject shell metacharacters through the jsonrpc interface parameters to achieve remote code execution on the host running radare2-mcp without requiring authentication.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
77.6%
KEV
Not listed

Published

April 23, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jul 16, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit.
generic Patch Available

radare2-mcp <=1.6.0 OS Command Injection via Shell Metacharacter Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/radare2-mcp-os-command-injection-via-shell-metacharacter-bypass
github_commit Patch Available

commit 482cde650000 (radareorg/radare2-mcp)

Patch available: radareorg/radare2-mcp 1.7.0 (contains commit 482cde650000)

https://github.com/radareorg/radare2-mcp/commit/482cde6500009112a8bc0b3fa8d2ef6180581ec0
generic🟡 PoC Available

[Security] Arbitrary Host Command Execution via `!` shell escape in MCP tools · Issue #45 · radareorg/radare2-mcp · GitHub

https://github.com/radareorg/radare2-mcp/issues/45

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 45× 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 215 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-13 22:31 UTCEPSS rescore
  5. 2026-07-13 06:13 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-12 05:46 UTCEPSS rescore
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-08 15:16 UTCEPSS rescore
  13. 2026-07-08 15:16 UTCEPSS rescore
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 02:23 UTCEPSS rescore
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-05 02:31 UTCEPSS rescore
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-01 15:07 UTCEPSS rescore
  25. 2026-06-30 23:22 UTCEPSS rescore
Show 75 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-27 03:17 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-25 13:50 UTCEPSS rescore
  7. 2026-06-24 14:05 UTCEPSS rescore
  8. 2026-06-23 21:33 UTCEPSS rescore
  9. 2026-06-22 14:25 UTCEPSS rescore
  10. 2026-06-22 14:25 UTCEPSS rescore
  11. 2026-06-21 14:56 UTCEPSS rescore
  12. 2026-06-21 14:56 UTCEPSS rescore
  13. 2026-06-21 01:59 UTCEPSS rescore
  14. 2026-06-21 01:59 UTCEPSS rescore
  15. 2026-06-19 19:26 UTCEPSS rescore
  16. 2026-06-19 19:26 UTCEPSS rescore
  17. 2026-06-18 17:52 UTCEPSS rescore
  18. 2026-06-18 17:52 UTCEPSS rescore
  19. 2026-06-17 17:53 UTCEPSS rescore
  20. 2026-06-16 17:53 UTCEPSS rescore
  21. 2026-06-15 17:49 UTCEPSS rescore
  22. 2026-06-15 17:49 UTCEPSS rescore
  23. 2026-06-15 06:42 UTCEG score recompute
  24. 2026-06-15 06:42 UTCGHSA enrichment
  25. 2026-06-15 02:23 UTCEG score recompute
  26. 2026-06-15 02:23 UTCGHSA enrichment
  27. 2026-06-14 23:18 UTCEPSS rescore
  28. 2026-06-14 20:43 UTCEG score recompute
  29. 2026-06-14 20:43 UTCGHSA enrichment
  30. 2026-06-14 16:42 UTCEG score recompute
  31. 2026-06-14 16:42 UTCGHSA enrichment
  32. 2026-06-14 12:16 UTCEG score recompute
  33. 2026-06-14 12:16 UTCGHSA enrichment
  34. 2026-06-13 23:00 UTCEPSS rescore
  35. 2026-06-12 23:12 UTCEPSS rescore
  36. 2026-06-12 23:12 UTCEPSS rescore
  37. 2026-06-12 12:25 UTCEG score recompute
  38. 2026-06-12 12:25 UTCGHSA enrichment
  39. 2026-06-12 06:32 UTCEG score recompute
  40. 2026-06-12 06:32 UTCGHSA enrichment
  41. 2026-06-12 02:32 UTCEG score recompute
  42. 2026-06-12 02:32 UTCGHSA enrichment
  43. 2026-06-11 22:31 UTCEG score recompute
  44. 2026-06-11 22:31 UTCGHSA enrichment
  45. 2026-06-11 18:30 UTCEG score recompute
  46. 2026-06-11 18:30 UTCGHSA enrichment
  47. 2026-06-11 14:23 UTCEG score recompute
  48. 2026-06-11 14:23 UTCGHSA enrichment
  49. 2026-06-11 14:00 UTCEPSS rescore
  50. 2026-06-10 22:19 UTCEPSS rescore
  51. 2026-06-10 20:13 UTCEG score recompute
  52. 2026-06-10 20:13 UTCGHSA enrichment
  53. 2026-06-10 16:12 UTCEG score recompute
  54. 2026-06-10 16:12 UTCGHSA enrichment
  55. 2026-06-10 13:22 UTCEPSS rescore
  56. 2026-06-10 12:11 UTCEG score recompute
  57. 2026-06-10 12:11 UTCGHSA enrichment
  58. 2026-06-10 08:10 UTCEG score recompute
  59. 2026-06-10 08:10 UTCGHSA enrichment
  60. 2026-06-10 04:00 UTCEG score recompute
  61. 2026-06-10 04:00 UTCGHSA enrichment
  62. 2026-06-09 23:57 UTCEG score recompute
  63. 2026-06-09 23:57 UTCGHSA enrichment
  64. 2026-06-09 19:28 UTCEG score recompute
  65. 2026-06-09 19:28 UTCGHSA enrichment
  66. 2026-06-09 15:27 UTCEG score recompute
  67. 2026-06-09 15:27 UTCGHSA enrichment
  68. 2026-06-09 11:27 UTCEG score recompute
  69. 2026-06-09 11:27 UTCGHSA enrichment
  70. 2026-06-09 07:26 UTCEG score recompute
  71. 2026-06-09 07:26 UTCGHSA enrichment
  72. 2026-06-09 03:20 UTCEG score recompute
  73. 2026-06-09 03:20 UTCGHSA enrichment
  74. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  75. 2026-06-08 14:17 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-6942?
CVE-2026-6942 is a critical vulnerability published on April 23, 2026. radare2-mcp version 1.6.0 and earlier contains an os command injection vulnerability that allows remote attackers to execute arbitrary commands by bypassing the command filter through shell metacharacters in user-controlled input passed to r2cmdstr(). Attackers can inject shell metacharacters…
When was CVE-2026-6942 disclosed?
CVE-2026-6942 was first published in the National Vulnerability Database on April 23, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6942 actively exploited?
CVE-2026-6942 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6942?
CVE-2026-6942 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-6942?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6942, 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.

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