CVE-2026-6942

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-23. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: Elevated riskExposed: 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)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
79%
KEV
Not listed

Published

April 23, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Sep 12, 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 5× in last 7d / 30× 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 267 total refreshes for this CVE.

  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-12 15:02 UTCEPSS rescore
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-10 09:35 UTCEPSS rescore
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-05 15:31 UTCEPSS rescore
  9. 2026-09-04 05:07 UTCEPSS rescore
  10. 2026-09-04 03:29 UTCOSV refresh
  11. 2026-09-02 14:12 UTCEPSS rescore
  12. 2026-09-01 13:54 UTCEPSS rescore
  13. 2026-09-01 04:40 UTCEPSS rescore
  14. 2026-08-30 19:17 UTCEPSS rescore
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:42 UTCEPSS rescore
  17. 2026-08-26 14:47 UTCEPSS rescore
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-20 22:56 UTCEPSS rescore
  22. 2026-08-19 17:04 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 13:49 UTCEPSS rescore
  25. 2026-08-17 14:56 UTCEG score recompute
Show 75 more
  1. 2026-08-17 14:56 UTCGHSA enrichment
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 09:53 UTCGHSA enrichment
  6. 2026-08-16 05:52 UTCEG score recompute
  7. 2026-08-16 05:52 UTCGHSA enrichment
  8. 2026-08-16 02:15 UTCEPSS rescore
  9. 2026-08-15 01:31 UTCEPSS rescore
  10. 2026-08-15 00:17 UTCGHSA enrichment
  11. 2026-08-14 20:16 UTCGHSA enrichment
  12. 2026-08-14 16:15 UTCGHSA enrichment
  13. 2026-08-14 12:14 UTCGHSA enrichment
  14. 2026-08-14 08:13 UTCGHSA enrichment
  15. 2026-08-14 04:12 UTCEG score recompute
  16. 2026-08-14 04:12 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 08:36 UTCGHSA enrichment
  19. 2026-08-13 01:58 UTCGHSA enrichment
  20. 2026-08-12 21:57 UTCGHSA enrichment
  21. 2026-08-12 17:56 UTCEG score recompute
  22. 2026-08-12 17:56 UTCGHSA enrichment
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-12 00:44 UTCGHSA enrichment
  25. 2026-08-11 20:43 UTCGHSA enrichment
  26. 2026-08-11 16:43 UTCEG score recompute
  27. 2026-08-11 16:43 UTCGHSA enrichment
  28. 2026-08-11 06:13 UTCGHSA enrichment
  29. 2026-08-11 02:13 UTCEG score recompute
  30. 2026-08-11 02:13 UTCGHSA enrichment
  31. 2026-08-11 00:00 UTCEPSS rescore
  32. 2026-08-10 12:47 UTCGHSA enrichment
  33. 2026-08-10 08:43 UTCGHSA enrichment
  34. 2026-08-10 04:43 UTCGHSA enrichment
  35. 2026-08-10 00:42 UTCGHSA enrichment
  36. 2026-08-09 20:40 UTCGHSA enrichment
  37. 2026-08-09 16:40 UTCGHSA enrichment
  38. 2026-08-09 12:39 UTCGHSA enrichment
  39. 2026-08-09 07:25 UTCGHSA enrichment
  40. 2026-08-09 03:24 UTCEG score recompute
  41. 2026-08-09 03:24 UTCGHSA enrichment
  42. 2026-08-08 16:37 UTCEPSS rescore
  43. 2026-08-08 13:00 UTCGHSA enrichment
  44. 2026-08-08 08:47 UTCGHSA enrichment
  45. 2026-08-08 04:46 UTCGHSA enrichment
  46. 2026-08-08 00:42 UTCGHSA enrichment
  47. 2026-08-07 20:41 UTCGHSA enrichment
  48. 2026-08-07 16:40 UTCEG score recompute
  49. 2026-08-07 16:40 UTCGHSA enrichment
  50. 2026-08-07 12:39 UTCGHSA enrichment
  51. 2026-08-06 21:15 UTCGHSA enrichment
  52. 2026-08-06 17:14 UTCEG score recompute
  53. 2026-08-06 17:14 UTCGHSA enrichment
  54. 2026-08-06 13:47 UTCEPSS rescore
  55. 2026-08-06 11:26 UTCGHSA enrichment
  56. 2026-08-06 07:01 UTCGHSA enrichment
  57. 2026-08-06 03:00 UTCGHSA enrichment
  58. 2026-08-05 22:59 UTCEG score recompute
  59. 2026-08-05 22:59 UTCGHSA enrichment
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-04 15:10 UTCEPSS rescore
  63. 2026-08-04 10:39 UTCEPSS rescore
  64. 2026-08-04 05:33 UTCGHSA enrichment
  65. 2026-08-04 01:10 UTCGHSA enrichment
  66. 2026-08-03 21:09 UTCEG score recompute
  67. 2026-08-03 21:09 UTCGHSA enrichment
  68. 2026-08-03 10:36 UTCEPSS rescore
  69. 2026-08-02 23:33 UTCGHSA enrichment
  70. 2026-08-02 19:31 UTCGHSA enrichment
  71. 2026-08-02 15:30 UTCGHSA enrichment
  72. 2026-08-02 11:29 UTCEG score recompute
  73. 2026-08-02 11:29 UTCGHSA enrichment
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-01 04:16 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 2% probability of exploitation in the next 30 days, which ranks it in the top 21.2% of all scored CVEs.
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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