AWS strands-agents-sdk A2A Server context_id exposure of resource

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k1.24

Summaryinfo

A vulnerability was found in AWS strands-agents-sdk and classified as critical. This vulnerability affects unknown code of the component A2A Server. Such manipulation of the argument context_id leads to exposure of resource. This vulnerability is referenced as CVE-2026-115419. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in AWS strands-agents-sdk (the affected version is unknown). Affected by this issue is an unknown code of the component A2A Server. The manipulation of the argument context_id with an unknown input leads to a exposure of resource vulnerability. Using CWE to declare the problem leads to CWE-668. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The A2A server component in Amazon Strands Agents SDK for Python before 1.43.0 and Amazon Strands Agents SDK for TypeScript before 1.5.0 does not properly isolate conversation state between callers. An authenticated remote user could read other tenants' conversation history and add persistent instructions that alter model behavior for subsequent callers via HTTP requests to the A2A endpoint using a different context_id. To mitigate this issue, users should upgrade to strands-agents 1.43.0 (Python) or @strands-agents/sdk 1.5.0 (TypeScript).

The advisory is available at pypi.org. This vulnerability is handled as CVE-2026-115419 since 10/22/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (AMZN): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Exposure of resource
CWE: CWE-668 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/22/2026 Advisory disclosed
10/22/2026 +0 days CVE reserved
10/22/2026 +0 days VulDB entry created
10/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: pypi.org
Status: Not defined

CVE: CVE-2026-115419 (🔒)
GCVE (CVE): GCVE-0-2026-115419
GCVE (VulDB): GCVE-100-425450

Entryinfo

Created: 10/22/2026 22:32
Changes: 10/22/2026 22:32 (73)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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