VulnerabilityPublished 20 Aug 2026Updated 25 Aug 2026

CVE-2026-75910: AWS Athena Federated Query Clickhouse Connector deployment template · Incorrect Privilege Assignment

Affects AWS Athena Federated Query Clickhouse Connector deployment templateSource CVE Database V5

Not known to be exploited · CVSS 6.5 Medium : upgrade to 2026.17.1 when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

6.5Medium

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

EPSS

0.5% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-08-25.

Patch

Available – fixed in 2026.17.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

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

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, 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: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Aug 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.

What to do

Upgrade AWS Athena Federated Query Clickhouse Connector deployment template to 2026.17.1.

Affected software

Product	Affected	Fixed in
AWSAthena Federated Query Clickhouse Connector deployment template	Affected <2026.17.1	Fixed in 2026.17.1

AI-suggested

A fix is available in aws-athena-query-federation connectors version 2026.17.1 and later. Users should upgrade to this version or newer to remediate the vulnerability. Alternatively, users can redeploy the connector using the current deployment template and provide a non-empty SecretNamePrefix value to mitigate the issue. Ensure that any forked or derivative code is also patched accordingly. Since this is a cloud-hosted service component, AWS manages remediation for the cloud service, but customers must update their deployed connectors.

Description

CVE-2026-75910 is a vulnerability in the ClickHouse connector deployment template for Amazon Athena Federated Query prior to version 2026.17.1. It involves incorrect privilege assignment that could allow an authenticated remote user to read arbitrary AWS Secrets Manager secrets in the deploying account. This occurs if the attacker points the connector's connection string to an unrelated secret and a database endpoint under their control, causing the secret to be transmitted to that endpoint. The issue is fixed in version 2026.17.1. Users should upgrade to this version or later, or redeploy the connector with the current template and specify a non-empty SecretNamePrefix value to mitigate the risk.

Reports on CVE-2026-75910

CVE-2026-75910: Issue with Athena Federated Query Clickhouse ConnectorAWS Security Bulletins2026-08-20

Impact

An authenticated remote user could read arbitrary AWS Secrets Manager secrets in the deploying AWS account by exploiting this vulnerability. This leads to unauthorized disclosure of sensitive information stored in Secrets Manager. The CVSS 3.1 base score is 6.5 (medium severity) with high confidentiality impact, no integrity or availability impact, and requires low privileges with no user interaction.

CWE-266Incorrect Privilege Assignment (opens in a new tab)
Base weaknessOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.
Architecture and Design · Operation
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design · Operation · Environment Hardening
Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment.
OWASP Cheat Sheets
Docker Security (opens in a new tab)
Third Party Javascript Management (opens in a new tab)
Virtual Patching (opens in a new tab)
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V1.4.4 (opens in a new tab)
V1.4.5 (opens in a new tab)
V1.10.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

Reports on CVE-2026-75910

AI analysisMachine-generated, updated 26 Oct 2026, 09:13 UTC

WeaknessesCWE-266

Technical details

References

Community reviews

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