strands-agents-tools
CVE-2026-15746
MEDIUM
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/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
Three required deployment prerequisites justify AC:H; UI:R reflects mandatory LLM processing of attacker-controlled input; no integrity or availability impact applies.
Primary rating from Vendor (AMZN).
CVSS VectorVendor: AMZN
CVSS:4.0/AV:N/AC:L/AT:N/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
Lifecycle Timeline
1DescriptionCVE.org
Strands Agents is an open-source Python SDK for building and running AI agents. The strands-agents-tools package provides pre-built tools for use with the SDK, including the elasticsearch_memory tool for agent memory storage. We identified CVE-2026-15746, a server-side request forgery (SSRF) issue in the elasticsearch_memory tool. The tool exposed its connection parameters (es_url, cloud_id, api_key) as fields the large language model (LLM) could control through the tool schema. When a caller omitted the api_key parameter, the tool fell back to the operator's ELASTICSEARCH_API_KEY environment variable and sent it to whichever host the LLM specified. A crafted prompt could cause the tool to connect to a threat-actor-controlled server and disclose the operator's Elasticsearch API key in the Authorization header.
We recommend you upgrade to strands-agents-tools version 0.7.0 or later. As a precautionary measure, we recommend all operators rotate their ELASTICSEARCH_API_KEY, even if there is no indication the credential was exposed.
AnalysisAI
Server-side request forgery in the strands-agents-tools elasticsearch_memory tool enables prompt-injection attacks that exfiltrate the operator's Elasticsearch API key to attacker-controlled infrastructure. Applications using strands-agents-tools prior to 0.7.0 that rely on the ELASTICSEARCH_API_KEY environment-variable fallback - rather than explicitly passing api_key - are exposed to credential theft when an attacker can influence LLM input. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires four concurrent conditions to be true simultaneously: (1) the target application uses the strands-agents-tools elasticsearch_memory tool, (2) the ELASTICSEARCH_API_KEY environment variable is populated in the agent process, (3) the caller does not explicitly pass the api_key argument - triggering the environment-variable fallback that sends the credential to the LLM-specified host - and (4) an attacker can influence the content the LLM processes, either through direct user input, retrieved external documents, or injected tool output. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N) scores 6.9 (Medium), reflecting high confidentiality impact against the vulnerable system but requiring active user interaction (UI:A) - in practice, the LLM must process attacker-influenced content. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker embeds a crafted instruction in content the LLM processes - such as a malicious document retrieved from a user-supplied URL, adversarial user message, or poisoned tool output - directing the elasticsearch_memory tool to connect to an attacker-controlled HTTPS endpoint by overriding the es_url parameter. Because the operator omitted the explicit api_key argument, the tool appends the ELASTICSEARCH_API_KEY environment variable to the Authorization header of the outbound HTTP request, where the attacker's server logs and exfiltrates it. … |
| Remediation | The primary fix is to upgrade strands-agents-tools to version 0.7.0 or later via pip install --upgrade strands-agents-tools, confirmed available at https://pypi.org/project/strands-agents-tools/0.7.0/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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