Vulnerability details
CVE-2026-81849
Amazon amazon-ssm-agent
Path traversal in the aws:downloadContent plugin in amazon-ssm-agent
CVSS 4.0
8.7High
Official description
Improper limitation of a pathname to a restricted directory in the aws:downloadContent plugin in amazon-ssm-agent before 3.3.4515.0 might allow an authenticated remote user whose ssm:SendCommand permission is restricted to the AWS-DownloadContent document, to write arbitrary files outside the intended download directory with root privileges, via crafted object keys in the S3 source the document is directed to retrieve. This issue may lead to arbitrary code execution as root if specific sensitive files are overwritten. To remediate this issue, customers should upgrade amazon-ssm-agent to version 3.3.4515.0 or later.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (AMZN) | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (AMZN) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Amazon | amazon-ssm-agent | v < 3.3.4515.0 | CVEProject cvelistV5 (CNA) |
References and advisories
2- https://github.com/aws/amazon-ssm-agent/releases/tag/3.3.4515.0 patchrelease-notes
- https://aws.amazon.com/security/security-bulletins/2026-091-aws/ vendor-advisory
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Details
- Published
- 2026-08-28
- Last updated
- 2026-08-31
- State
- Published
- Assigner (CNA)
- AMZN
Exploit prediction (EPSS)
0.89%
Probability of exploitation in 30 days
59.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-23Relative Path Traversal