CVE-2026-4810: Google adk Google Agent Development Kit (ADK) Vulnerability

CRITICAL
Advisory Identifier: GHSA-rg7c-g689-fr3x
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CWE-306
Published
Advisory Summary

CVE-2026-4810 is a CRITICAL google agent development kit (adk) vulnerability (CWE-306: Missing Authentication for Critical Function) affecting Google adk libraries in the PyPI ecosystem. The issue involves google agent development kit (adk) has a code injection and missing authentication vulnerability. Remediation is available by upgrading affected packages to version 1.28.1, 2.0.0a2.

CVE-2026-4810 at a Glance

CVE Identifier CVE-2026-4810
GHSA Identifier GHSA-rg7c-g689-fr3x
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product Google adk
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2026-4810

To remediate this vulnerability, upgrade all affected Google adk dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

google-adk fixed: 1.28.1 
pip install google-adk>=1.28.1
google-adk fixed: 2.0.0a2 
pip install google-adk>=2.0.0a2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show google-adk

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-4810, inspect your installed packages using pip:

pip show google-adk

Analyze the terminal output to locate any version of Google adk in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.28.1), your application is affected.

Note: The pip show google-adk command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. In Google adk, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A Code Injection and Missing Authentication vulnerability in Google Agent Development Kit (ADK) versions 1.7.0 (and 2.0.0a1) through 1.28.1 (and 2.0.0a2) on Python (OSS), Cloud Run, and GKE allows an unauthenticated remote attacker to execute arbitrary code on the server hosting the ADK instance. This vulnerability was patched in versions 1.28.1 and 2.0.0a2. Customers need to redeploy the upgraded ADK to their production environments. In addition, if they are running ADK Web locally, they also need to upgrade their local instance.

CVE-2026-4810 Affected Google adk Versions

2 component(s)
Fixed Versions:
1.28.12.0.0a2
Product / Package Ecosystem Affected Versions Fixed Version
google-adk
pypi/google-adk
PyPI
≥ 1.7.0
< 1.28.1
1.28.1
google-adk
pypi/google-adk
PyPI
≥ 2.0.0a1
< 2.0.0a2
2.0.0a2

References

NVD — CVE-2026-4810 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4810
Google adk Source Repository REPOSITORY
https://github.com/google/adk-python
Google adk Source Repository REPOSITORY
https://github.com/google/adk-python/blob/main/CHANGELOG.md#1274-2026-03-26

Frequently Asked Questions

What is CVE-2026-4810?
CVE-2026-4810 is a security vulnerability in Google adk involving Google Agent Development Kit (ADK) has a Code Injection and Missing Authentication vulnerability under CWE-306: Missing Authentication for Critical Function.
Which Google adk versions are affected?
Affected versions include releases prior to 1.28.1, 2.0.0a2 across affected packages: google-adk.
What version fixes CVE-2026-4810?
Upgrading to 1.28.1, 2.0.0a2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is google-adk affected?
Yes, google-adk is affected in releases prior to 1.28.1, 2.0.0a2. Upgrade your dependency to 1.28.1, 2.0.0a2 or later.
What CWE is associated with CVE-2026-4810?
CVE-2026-4810 is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check PyPI dependencies for CVE-2026-4810?
Run the dependency tree command: 'pip show google-adk'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rg7c-g689-fr3x",
  "modified" : "2026-04-24T19:42:36Z",
  "published" : "2026-04-13T09:31:33Z",
  "aliases" : [ "CVE-2026-4810" ],
  "summary" : "Google Agent Development Kit (ADK) has a Code Injection and Missing Authentication vulnerability",
  "details" : "A Code Injection and Missing Authentication vulnerability in Google Agent Development Kit (ADK) versions 1.7.0 (and 2.0.0a1) through 1.28.1 (and 2.0.0a2) on Python (OSS), Cloud Run, and GKE allows an unauthenticated remote attacker to execute arbitrary code on the server hosting the ADK instance.\n\nThis vulnerability was patched in versions 1.28.1 and 2.0.0a2.\n\n\nCustomers need to redeploy the upgraded ADK to their production environments. In addition, if they are running ADK Web locally, they also need to upgrade their local instance.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/U:Amber"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "google-adk"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.7.0"
      }, {
        "fixed" : "1.28.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "google-adk"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0a1"
      }, {
        "fixed" : "2.0.0a2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-4810"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/google/adk-python"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/google/adk-python/blob/main/CHANGELOG.md#1274-2026-03-26"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-14T22:29:08Z",
    "nvd_published_at" : "2026-04-13T09:16:08Z"
  }
}