CVE-2026-4810Public exploitNetwork attack vector

Unauthenticated code execution via builder YAML args

Published Apr 13, 2026 · Updated Apr 13, 2026

Code injection in Google Agent Development Kit 1.7.0 through 1.28.0 and 2.0.0a1 allows remote attackers to execute arbitrary server code. The unauthenticated /builder/save endpoint accepts uploaded agent YAML whose args keys pass arbitrary arguments to Python constructors and functions. An exposed ADK Web builder is the required gate, and successful requests execute with the hosting ADK process's privileges.

CVSS severity10.0
Critical
EPSS probability1.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Google Agent Development Kit 1.7.0 through 1.28.0 and 2.0.0a1 allows remote attackers to execute arbitrary server code. The unauthenticated /builder/save endpoint accepts uploaded agent YAML whose args keys pass arbitrary arguments to Python constructors and functions. An exposed ADK Web builder is the required gate, and successful requests execute with the hosting ADK process's privileges.

The record

CVE
CVE-2026-4810
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
Go standard library
Product
Agent Development Kit (ADK)
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.7.0 <1.28.1
  2. Affected versionversion=2.0.0a1 <2.0.0a2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Agent Development Kit (ADK)version=1.7.0 <1.28.1; version=2.0.0a1 <2.0.0a2

Published CVSS scores

10.0SnykCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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