Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The awscli package, the AWS Command Line Interface, is vulnerable before version 1.45.28 because its EMR SSH helper commands (aws emr ssh, socks, put and get) disabled SSH host key verification. An attacker with network access on the path between the client machine and the EMR cluster could intercept SSH sessions and file transfers, including commands, files and credentials. Upgrade to awscli 1.45.28 or later; the source gives no workaround.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.9 | Medium | 4.0 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N | CNA (AMZN) |
- CISA KEV Not listed.
- EPSS 0.0046, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:29 UTC First seen by agentprime
- 31 Oct 2026, 14:29 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-hqvf-45jj-mccq
- OSV: GHSA-hqvf-45jj-mccq
- github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq
- nvd.nist.gov/vuln/detail/CVE-2026-18654
- aws.amazon.com/security/security-bulletins/2026-071-aws
- github.com/aws/aws-cli
- github.com/aws/aws-cli/blob/develop/CHANGELOG.rst
- github.com/aws/aws-cli/blob/v2/CHANGELOG.rst