What is CVE-2026-18394?

CVE-2026-18394 is a high-severity vulnerability in AWS Strands Agents Tools, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-07-31.

How severe is CVE-2026-18394?

High severity. CVSS v3 base score is 7.4 out of 10.

Auth bypass in AWS Strands Agents Tools

CVE-2026-18394

Incorrect authorization in the http_request tool in Strands Agents Tools before 0.8.2 might allow remote attackers to obtain credentials configured via HTTP_REQUEST_TOKEN_CONFIG by influencing the LLM to route requests through actor-controlled proxy infrastructure. To remediate this issue, users should upgrade to version 0.8.2.

Vulnerability class: Broken Access Control

EPSS: 0.003 (21.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Aws Strands Agents Tools — versions 0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)

Frequently asked questions

What is CVE-2026-18394?: CVE-2026-18394 is a high-severity vulnerability in AWS Strands Agents Tools, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-07-31.
How severe is CVE-2026-18394?: High severity. CVSS v3 base score is 7.4 out of 10.