CVE-2026-18733

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: 0.3%, top 75% 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
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: None knownExposed: 0

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

A prompt injection vulnerability in the shell tool in Amazon Strands Agents Tools before 0.8.0 might allow remote actors to execute arbitrary operating system commands on the agent's host via a crafted prompt that sets the non_interactive parameter to true, bypassing the human consent gate.

To remediate this issue, users should upgrade to version 0.8.0.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 4, 2026

Advisory Details (3)

Auto-updated Aug 3, 2026
Patch available. Sources: github.
github Patch Available

Prompt injection bypasses shell tool consent gate in Strands Agents Tools · Advisory · strands-agents/tools · GitHub

https://github.com/strands-agents/tools/security/advisories/GHSA-mqvc-p852-wf8x
generic

CVE-2026-18733 - Prompt injection bypasses shell tool consent gate in Strands Agents Tools

https://aws.amazon.com/security/security-bulletins/2026-072-aws/
generic

strands-agents-tools · PyPI

https://pypi.org/project/strands-agents-tools/0.8.0/

Vendor Advisories for CVE-2026-18733(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 50× 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. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 04:42 UTCEG score recompute
  3. 2026-09-17 01:13 UTCEG score recompute
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 05:18 UTCEG score recompute
  6. 2026-09-16 05:14 UTCEPSS rescore
  7. 2026-09-15 16:54 UTCEG score recompute
  8. 2026-09-13 23:08 UTCEG score recompute
  9. 2026-09-13 16:46 UTCEPSS rescore
  10. 2026-09-12 22:08 UTCEG score recompute
  11. 2026-09-12 15:00 UTCEPSS rescore
  12. 2026-09-11 21:19 UTCEG score recompute
  13. 2026-09-11 14:52 UTCEPSS rescore
  14. 2026-09-11 09:36 UTCEPSS rescore
  15. 2026-09-10 20:31 UTCEG score recompute
  16. 2026-09-10 09:34 UTCEPSS rescore
  17. 2026-09-09 06:42 UTCEG score recompute
  18. 2026-09-08 22:00 UTCEPSS rescore
  19. 2026-09-07 18:46 UTCEG score recompute
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-06 19:31 UTCEG score recompute
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-05 18:38 UTCEG score recompute
  24. 2026-09-05 04:17 UTCEG score recompute
  25. 2026-09-04 10:16 UTCEG score recompute
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  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-03 08:41 UTCEG score recompute
  3. 2026-09-02 14:11 UTCEPSS rescore
  4. 2026-09-01 20:57 UTCEG score recompute
  5. 2026-09-01 13:53 UTCEPSS rescore
  6. 2026-08-30 22:48 UTCEG score recompute
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 10:25 UTCEG score recompute
  9. 2026-08-30 01:22 UTCEPSS rescore
  10. 2026-08-29 21:57 UTCEG score recompute
  11. 2026-08-28 21:41 UTCEPSS rescore
  12. 2026-08-27 20:53 UTCEG score recompute
  13. 2026-08-27 14:25 UTCEPSS rescore
  14. 2026-08-26 19:11 UTCEG score recompute
  15. 2026-08-26 14:46 UTCEPSS rescore
  16. 2026-08-25 14:47 UTCEG score recompute
  17. 2026-08-25 13:48 UTCEPSS rescore
  18. 2026-08-25 02:23 UTCEG score recompute
  19. 2026-08-24 13:59 UTCEG score recompute
  20. 2026-08-23 00:39 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-21 23:51 UTCEG score recompute
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-21 11:27 UTCEG score recompute
  25. 2026-08-20 22:55 UTCEPSS rescore
  26. 2026-08-19 21:56 UTCEG score recompute
  27. 2026-08-19 17:03 UTCEPSS rescore
  28. 2026-08-18 21:07 UTCEG score recompute
  29. 2026-08-18 13:48 UTCEPSS rescore
  30. 2026-08-17 19:36 UTCEG score recompute
  31. 2026-08-17 13:47 UTCEPSS rescore
  32. 2026-08-16 17:40 UTCEG score recompute
  33. 2026-08-16 14:56 UTCEPSS rescore
  34. 2026-08-16 05:16 UTCEG score recompute
  35. 2026-08-16 02:14 UTCEPSS rescore
  36. 2026-08-15 04:29 UTCEG score recompute
  37. 2026-08-15 01:30 UTCEPSS rescore
  38. 2026-08-14 03:41 UTCEG score recompute
  39. 2026-08-13 22:00 UTCEPSS rescore
  40. 2026-08-12 14:31 UTCEG score recompute
  41. 2026-08-12 13:50 UTCEPSS rescore
  42. 2026-08-11 13:43 UTCEG score recompute
  43. 2026-08-11 13:42 UTCEPSS rescore
  44. 2026-08-11 01:20 UTCEG score recompute
  45. 2026-08-11 00:00 UTCEPSS rescore
  46. 2026-08-10 00:33 UTCEG score recompute
  47. 2026-08-09 13:46 UTCEPSS rescore
  48. 2026-08-08 23:46 UTCEG score recompute
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-07 22:59 UTCEG score recompute
  51. 2026-08-06 22:09 UTCEG score recompute
  52. 2026-08-06 13:46 UTCEPSS rescore
  53. 2026-08-05 21:20 UTCEG score recompute
  54. 2026-08-05 19:17 UTCEPSS rescore
  55. 2026-08-04 20:34 UTCEG score recompute
  56. 2026-08-04 20:07 UTCEG score recompute
  57. 2026-08-04 15:10 UTCEPSS rescore
  58. 2026-08-03 21:20 UTCEG score recompute
  59. 2026-08-03 20:43 UTCEG score recompute
  60. 2026-08-03 20:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18733?
CVE-2026-18733 is a high vulnerability published on August 3, 2026. A prompt injection vulnerability in the shell tool in Amazon Strands Agents Tools before 0.8.0 might allow remote actors to execute arbitrary operating system commands on the agent's host via a crafted prompt that sets the non_interactive parameter to true, bypassing the human consent gate. To…
When was CVE-2026-18733 disclosed?
CVE-2026-18733 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18733 actively exploited?
CVE-2026-18733 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 74.5% of all scored CVEs.
What is the CVSS score of CVE-2026-18733?
CVE-2026-18733 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-18733?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18733, 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

Explore the affected products and dependency analysis for CVE-2026-18733

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