# CVE-2026-115415: Secret masking bypass in the environment tool in Strands Agents Tools

Status: published. Published: 2026-10-28. Updated: 2026-11-05.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: AMZN) — https://github.com/strands-agents/tools/releases#release-v0.8.6

## Affected products and versions

- amazon / strands-agents-tools: ≥ 0.1.0; < 0.8.6 (affected, custom). Source: CNA: AMZN

## Severity and prioritization

- CVSS 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; source: CNA: AMZN

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N; source: CNA: AMZN

- CVSS 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; source: NVD: ff89ba41-3aa1-4d27-914a-91399e9639e5

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N; source: NVD: ff89ba41-3aa1-4d27-914a-91399e9639e5

- CISA KEV: No listing in collected sources

- EPSS: 0.34% as of 2026-11-05; percentile 27.94%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-1427

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/strands-agents/tools/releases#release-v0.8.6 (CNA: 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-2f34 (CNA: 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-v0.8.6 (ff89ba41-3aa1-4d27-914a-91399e9639e5)

- https://github.com/strands-agents/tools/security/advisories/GHSA-qjx4-hg6g-2f34 (ff89ba41-3aa1-4d27-914a-91399e9639e5)

## Provenance

- CNA: AMZN: https://www.cve.org/CVERecord?id=CVE-2026-115415; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-115415; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115415; retrieved 2026-11-05; source updated Not reported

Revision: 69ff891b2d8225f3a6de27fa79085127bd361edc8ae72bb12d1e1355f7d0ac99

Canonical: https://y2.dev/cve/CVE-2026-115415

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