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Aix-DB CVE-2026-8335

| EUVDEUVD-2026-36050 HIGH
Missing Authentication for Critical Function (CWE-306)
2026-06-10 CERT-PL GHSA-x546-prg5-fvp8
7.1
CVSS 4.0 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach adjacent network segment hosting Aix-DB
  2. Delivery
    Identify exposed /llm/process_llm_out endpoint
  3. Exploit
    Send unauthenticated POST with crafted SELECT
  4. Execution
    Endpoint bypasses token middleware
  5. Persist
    Database returns query results
  6. Impact
    Iterate to enumerate schema and exfiltrate sensitive rows

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Attacker must have network reachability to the Aix-DB HTTP service from an adjacent network position (CVSS AV:A) - typically the same L2 segment, VPN, or routed internal subnet as the deployment, not arbitrary internet origin. The target must be running Aix-DB at or below version 1.2.4 with the /llm/process_llm_out endpoint exposed; no authentication, user interaction, or non-default configuration is required because the endpoint itself omits the token validation enforced on other routes. Impact is limited to data the application's database user can read via SELECT - write, delete, or DDL operations are not implicated, and stored procedures or non-SELECT statements may not execute depending on the endpoint's SQL handling.

Impact

The CVSS 4.0 base score of 7.1 is driven by AV:A (adjacent network) rather than AV:N, meaning the attacker must share a broadcast or routable segment with the Aix-DB host - for many internal deployments this is functionally equivalent to network-reachable, but it does limit drive-by internet exploitation. Confidentiality impact is High (VC:H) while integrity and availability are Not Impacted, consistent with a SELECT-only data read primitive. There is no EPSS score, KEV listing, or public POC referenced in the supplied intelligence, so exploitation is plausible-but-not-observed; the gating factor is real-world exposure of Aix-DB instances on reachable subnets, not technical difficulty. CERT-PL reporting lends credibility to the technical claim even though independent vendor confirmation is absent.

Exploit ScenarioDerived

An attacker who has gained a foothold on the same adjacent network as an Aix-DB deployment - for example via a compromised workstation, rogue Wi-Fi client, or lateral movement from another internal service - sends a crafted HTTP POST to /llm/process_llm_out carrying a SELECT statement against sensitive tables. Because the endpoint never invokes the token check used by sibling routes, the query executes and the response leaks rows directly to the attacker, who can iteratively enumerate schemas and extract data such as credentials, user records, or LLM prompt history. No public exploit identified at time of analysis, but the CERT-PL writeup describes the missing check at a level of detail that makes scripted abuse straightforward.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jun 10, 2026

Unauthenticated SQL data exfiltration in Aix-DB versions up to and including 1.2.4 allows attackers on adjacent networks to issue arbitrary SELECT queries against the application's database through the /llm/process_llm_out endpoint, which omits the token validation enforced on every other application route. The flaw was disclosed by CERT-PL and currently has no public exploit identified at time of analysis, but the CVSS 4.0 vector (AV:A/AC:L/PR:N/UI:N/VC:H) reflects trivial exploitation once an attacker reaches the deployment network. No vendor-released patch identified at time of analysis.

RemediationAI

No vendor-released patch identified at time of analysis, so until the apconw/Aix-DB maintainers publish a fix that enforces the standard token middleware on /llm/process_llm_out, operators should apply compensating controls: place Aix-DB behind a reverse proxy or WAF that requires authentication on the /llm/process_llm_out path (trade-off: breaks any legitimate client that depends on the unauthenticated behaviour), restrict network reachability of the Aix-DB listener to a trusted management segment using host or network firewalls to neutralise the AV:A vector, and monitor application/database logs for unexpected SELECT activity sourced from the LLM pipeline. Track the upstream repository at https://github.com/apconw/Aix-DB and CERT-PL's advisory at https://cert.pl/posts/2026/06/CVE-2026-8335 for an official fixed version.

Affected VersionsENISA

Aix-DB 0 ≤1.2.4

Affected Packages

euvd aix_db no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Aix-DB (cpe:2.3:a:aix-db:aix-db:*:*:*:*:*:*:*:*) is an LLM-backed database query application whose REST API normally gates requests with a token check. The /llm/process_llm_out endpoint, designed to handle LLM-generated SQL output, was implemented without that middleware, mapping directly to CWE-306 (Missing Authentication for Critical Function). Because the endpoint passes user-supplied SELECT statements straight through to the underlying datastore, any caller who can reach the HTTP listener can read database contents without first holding or forging an application token.

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Severity by source

NVD PRIMARY 7.1 HIGH
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

1
CVSS changed
Jun 10, 2026 - 15:22 NVD
7.1 (HIGH)

DescriptionNVD

A missing authentication check on the Aix‑DB "/llm/process_llm_out" endpoint allows unauthenticated clients to execute arbitrary "SELECT" SQL queries and retrieve database data, as the endpoint lacks the token validation enforced on all other application endpoints. All releases up to 1.2.4 are considered vulnerable. Status of next releases is unknown as the vulnerability has not been addressed by any patch.

Executive ViewAI

Why It Matters

Aix-DB versions 1.2.4 and earlier contain an unauthenticated SQL data exfiltration vulnerability with no public exploit identified at time of analysis, but trivial exploitation complexity once network access is obtained. Any organization using this database solution faces critical risk of complete database exposure from network-adjacent attackers without authentication. Immediate protective controls and vendor patch tracking are required to prevent full data breach.

Business Impact: High
Compensating Controls

Network segmentation to restrict Aix-DB deployment access to trusted networks only; Web Application Firewall (WAF) rules blocking all requests to /llm/process_llm_out endpoint; database-level IP whitelisting with deny-all default; enable comprehensive query logging and real-time monitoring for suspicious SELECT statements; consider air-gapping affected instances from untrusted networks until patch becomes available; implement network intrusion detection rules for CVE-2026-8335 exploitation patterns.

Threat Intelligence Overview

EPSS Score
0.0%
Top 93% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Controlled
Automatable
No
Human Impact
High
Technical Impact
Partial

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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