CVE-2026-115415
Secret masking bypass in the environment tool in Strands Agents Tools
Improper neutralization of input used for LLM prompting in the environment tool in Strands Agents Tools before 0.8.6 might allow remote actors to obtain the agent host's environment variables in cleartext, including cloud credentials and API keys, via a crafted prompt that disables the tool's secret masking. To remediate this issue, users should upgrade to version 0.8.6 or later and rotate any credentials that were present in the environment of agents that loaded the environment tool.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: AMZNAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| strands-agents-tools amazon |
≥ 0.1.0; < 0.8.6 (affected, custom)
Other versions: unaffected |
CNA: AMZN |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.9 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA: AMZN |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N | CNA: AMZN |
| 4.0 / 5.9 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: ff89ba41-3aa1-4d27-914a-91399e9639e5 |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N | NVD: ff89ba41-3aa1-4d27-914a-91399e9639e5 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/strands-agents/tools/releases#release-v0.8.6CNA: AMZN · patch, release-notes
- https://aws.amazon.com/security/security-bulletins/2026-154-aws/CNA: AMZN · vendor-advisory
- https://github.com/strands-agents/tools/security/advisories/GHSA-qjx4-hg6g-2f34CNA: AMZN · vendor-advisory
- https://aws.amazon.com/security/security-bulletins/2026-154-aws/ff89ba41-3aa1-4d27-914a-91399e9639e5
- https://github.com/strands-agents/tools/releases#release-v0.8.6ff89ba41-3aa1-4d27-914a-91399e9639e5
- https://github.com/strands-agents/tools/security/advisories/GHSA-qjx4-hg6g-2f34ff89ba41-3aa1-4d27-914a-91399e9639e5
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