CVE-2026-115522VulnerabilityPublished 28 Oct 2026

FileArtifactService · Resource Exposure

Affects google-adk-pythonSource GCVE Database

Authoritative record:CVE-2026-115522· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 2.7.0 or 1.39.1 when convenient.

Data as of 28 Oct 2026, 07:28 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 2.7.0, 1.39.1

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-hjvp-7px2-52j7

What to do

Upgrade google-adk-python to 2.7.0 or 1.39.1.

Affected software

Product	Affected	Fixed in
PyPIgoogle-adk-python`pkg:pypi/google-adk-python`Other threats	Affected <1.39.1 <2.7.0	Fixed in 1.39.1 2.7.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade affected Google ADK for Python versions to 1.39.1 or later in the 1.x series, or 2.7.0 or later in the 2.x series. These versions remove the legacy fallback path and enforce full per-application path scoping, preventing cross-application artifact access. No other mitigation is indicated by the vendor advisory.

Description

A vulnerability in Google Agent Development Kit (ADK) for Python's FileArtifactService allows an application to access artifacts of another application when both share a root directory and user ID. This occurs because the service accepted an application name in its API but did not use it when constructing on-disk paths, leading to cross-application access. The issue affects versions before 1.39.1 in the 1.x series and before 2.7.0 in the 2.x series. The vulnerability was addressed by enforcing full per-application path scoping in version 2.7.0 and backported to 1.39.1. The CVSS 4.0 base score is 5.3, indicating medium severity.

Impact

An attacker with access to the FileArtifactService API and the same user_id (and session_id for session-scoped artifacts) can access, modify, or delete artifacts belonging to other applications sharing the same root directory. This can lead to unauthorized data exposure and potential data integrity issues across applications. The vulnerability does not require user interaction and has a medium severity rating (CVSS 5.3). There are no known exploits in the wild.

Summary

The FileArtifactService component in Google ADK for Python versions 1.19.0 before 1.39.1 and 2.0.0a1 before 2.7.0 suffers from an Exposure of Resource to Wrong Sphere (CWE-668) vulnerability. The service accepted an app_name parameter across its public API methods but omitted this parameter when constructing on-disk file paths, using a shared root path based on user_id alone (root/users/{user_id}/...) instead of segregating by application (root/apps/{app_name}/users/{user_id}/...). This flaw allowed a caller in one application to list, read, overwrite, or delete artifacts belonging to another application if both shared the same root directory and user_id (and session_id for session-scoped artifacts). Version 2.6.0 introduced scoping writes by app_name but retained legacy fallback paths for reads and deletes, which was fully removed in version 2.7.0 and backported to 1.39.1, thereby enforcing strict per-app path scoping and mitigating the vulnerability.

CWE-668Exposure of Resource to Wrong Sphere (opens in a new tab)
Class weaknessOWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
OWASP Cheat Sheets
Authorization (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Oct 2026, 07:28 UTC

WeaknessesCWE-668

Technical details

References

Community reviews

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