CVE-2026-20030: Cisco Crosswork SQL Injection Vulnerability

CVE-2026-20030 Overview

Cisco disclosed CVE-2026-20030 as part of a software hardening release for Cisco Crosswork following an internal security review. The vulnerability stems from improper neutralization of special elements used in a SQL command [CWE-89], commonly referred to as SQL Injection. An unauthenticated remote attacker can send crafted input to a vulnerable Crosswork component and execute arbitrary SQL statements against the backend database. The flaw carries a CVSS 3.1 base score of 10.0 with a scope change, meaning successful exploitation can impact resources beyond the vulnerable component. No authentication or user interaction is required to trigger the issue.

Critical Impact
Unauthenticated network-based SQL injection with full confidentiality, integrity, and availability impact across a changed security scope.

Affected Products

Cisco Crosswork (see the Cisco Security Advisory for the complete list of affected releases)
Deployments running versions prior to the software hardening release
Multi-tenant Crosswork installations exposed to untrusted networks

Discovery Timeline

2026-08-19 - CVE-2026-20030 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-20030

Vulnerability Analysis

CVE-2026-20030 is a SQL Injection vulnerability identified during a Cisco Crosswork engineering-led internal security review. The weakness resides in one or more application interfaces that construct SQL queries by concatenating attacker-controllable input without adequate sanitization or parameterization. Because the attack vector is network-based and requires no privileges or user interaction, an adversary can reach the vulnerable endpoint directly and inject SQL clauses that alter query semantics. The scope-changed rating indicates that a successful attack can affect components authorized under a different security authority than the vulnerable component itself, such as the underlying database service or downstream integrations. Consequences include disclosure of network operations data, tampering with orchestration and inventory records, and disruption of automation workflows managed by Crosswork.

Root Cause

The root cause is improper neutralization of special elements in SQL statements, classified under [CWE-89]. User-supplied values are incorporated into SQL queries without prepared statements, parameter binding, or strict input validation, allowing injected metacharacters to change query structure.

Attack Vector

An unauthenticated attacker with network access to a Crosswork interface submits crafted request parameters containing SQL syntax. The backend executes the modified query, enabling data exfiltration, record modification, or execution of database-level functions depending on the account privileges used by the application. See the Cisco Security Advisory for vendor-specific technical detail.

// No verified proof-of-concept code is available for CVE-2026-20030.
// Refer to the Cisco Security Advisory for authoritative technical details.

Detection Methods for CVE-2026-20030

Indicators of Compromise

Unusual SQL error messages or database exceptions logged by Crosswork application services following external requests.
HTTP requests to Crosswork endpoints containing SQL metacharacters such as ', --, ;, UNION SELECT, or encoded variants.
Unexpected database read or write operations correlated with unauthenticated sessions in access logs.
New or modified rows in Crosswork inventory, policy, or orchestration tables without a corresponding administrative action.

Detection Strategies

Deploy web application firewall or reverse proxy rules that inspect requests to Crosswork endpoints for SQL injection payload patterns.
Enable database audit logging and alert on query patterns that reference schema metadata (information_schema, pg_catalog) originating from application service accounts.
Correlate application error rates with source IP reputation to surface probing activity against public-facing Crosswork interfaces.

Monitoring Recommendations

Forward Crosswork application, web, and database logs to a centralized analytics platform for retention and correlation.
Baseline normal query volume and alert on statistically significant spikes in SELECT, UNION, or error-inducing queries.
Monitor egress from Crosswork hosts for large or unusual data transfers that could indicate exfiltration following successful injection.

How to Mitigate CVE-2026-20030

Immediate Actions Required

Apply the Cisco Crosswork software hardening release referenced in the vendor advisory to remediate CVE-2026-20030.
Restrict network access to Crosswork management and API interfaces to trusted administrative networks using firewall rules or segmentation.
Rotate database credentials and audit database user privileges used by Crosswork application services.
Review authentication and access logs for anomalous activity dating back to the earliest possible exposure window.

Patch Information

Cisco has published a software hardening release that addresses this and other internally discovered vulnerabilities. Refer to the Cisco Security Advisory for fixed release versions, upgrade guidance, and applicability to specific Crosswork product variants.

Workarounds

Cisco has not published a specific workaround. Upgrading to the hardened release is the recommended remediation.
Where immediate patching is not feasible, place Crosswork behind a web application firewall with SQL injection signatures enabled and restrict inbound access to management networks.
Enforce least-privilege database accounts for Crosswork services to limit the blast radius of a successful injection.

bash

# Example: restrict inbound access to the Crosswork management interface
# Replace interface names and CIDRs to match your environment.
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP