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Vulnerabilities

Vulnerability · CVE-2026-115415

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

Published Oct 28, 2026 · catalog updated Oct 28, 2026 · Amazon Web Services

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-115415. EPSS is 0.34%. Act only if a listed version of Amazon Web Services is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.34%
Remediation
Advisory link
Affected products
vendor amazon strands-agents-tools

Bulletin ID: 2026-154-AWS Publication Date: 10/28/2026 12:30 PM PDT Description: We identified CVE-2026-115415, an issue where the environment tool accepted a masking parameter from the large language model (LLM) through its tool schema. A crafted prompt, delivered through content the agent is asked to process, could instruct the model to call the tool with masking turned off. The tool would then return the agent host's environment variables in cleartext, including cloud credentials and API keys, without prompting the operator for consent. Im

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor amazon strands-agents-toolsversion unspecified

How to fix CVE-2026-115415

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-115415. EPSS is 0.34%. Act only if a listed version of Amazon Web Services is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1427. EPSS 0.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · CVE.org

    Updated

    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 cre

  2. Oct 28, 2026 · AWS Security Bulletins

    Detected

    Bulletin ID: 2026-154-AWS Publication Date: 10/28/2026 12:30 PM PDT Description: We identified CVE-2026-115415, an issue where the environment tool accepted a masking parameter from the large language model (LLM) through its tool schema. A crafted prompt, delivered through content the agent is asked to process, could instruct the model to call the tool with masking turned off. The tool would then

Sources

  • AWS Security BulletinsVendor advisoryCVE-2026-115415

    Read this article

    aws.amazon.com
  • CVE.orgVulnerability recordCVE-2026-115415

    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 disabl

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-115415

    30-day exploitation probability 0.34%

    first.org

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • AWS Security BulletinsNov 7, 2026
  • FIRST EPSSNov 7, 2026
  • CVE.orgOct 29, 2026