CVE-2026-8338: Coverity Connect Auth Bypass Vulnerability

CVE-2026-8338 Overview

CVE-2026-8338 is an authentication and authorization bypass vulnerability in Black Duck Coverity Connect. The flaw resides in the Spring Security configuration and affects Coverity Connect versions 2023.6.0 through 2026.3.0. An unauthenticated attacker can send a specially crafted HTTP request to bypass authentication and authorization controls on certain API endpoints. Successful exploitation grants unauthorized access to data stored within Coverity. The weakness is classified under [CWE-288] (Authentication Bypass Using an Alternate Path or Channel). Because Coverity Connect stores source code analysis results, static analysis findings, and defect metadata, unauthorized access can expose sensitive intellectual property and security-relevant defect information.

Critical Impact
Unauthenticated attackers can reach protected Coverity Connect API endpoints over the network and retrieve data without valid credentials.

Affected Products

Black Duck Coverity Connect 2023.6.0 and later
Black Duck Coverity Connect versions up to and including 2026.3.0
Deployments exposing the Coverity Connect web interface or API to untrusted networks

Discovery Timeline

2026-07-29 - CVE-2026-8338 published to the National Vulnerability Database
2026-07-29 - Last updated in NVD database

Technical Details for CVE-2026-8338

Vulnerability Analysis

Coverity Connect is the web-based management server for the Coverity static analysis platform. It exposes REST and internal API endpoints protected by the Spring Security framework. CVE-2026-8338 stems from a defect in how Coverity Connect applies Spring Security filter rules to incoming HTTP requests. Under specific request conditions, the security filter chain fails to enforce authentication and authorization on endpoints that should require an authenticated session. An attacker who crafts a request matching the flawed path or header pattern reaches protected controllers as if the security context were satisfied. The result is direct access to API responses containing analysis data, project metadata, or defect records normally restricted to authorized users.

Root Cause

The root cause is an improper Spring Security configuration that permits an alternate request path to bypass the intended authentication filter. This matches the [CWE-288] pattern, where a secondary channel reaches the same functionality without invoking the primary authentication check. The defect exists across a broad range of Coverity Connect releases from 2023.6.0 through 2026.3.0, indicating the flawed filter logic was carried forward across multiple product versions.

Attack Vector

Exploitation requires only network access to the Coverity Connect HTTP interface. The attacker sends a specially crafted HTTP request targeting a vulnerable API endpoint. No user interaction and no valid credentials are required. The Black Duck advisory notes that crafting the request requires knowledge of the specific endpoint pattern that triggers the bypass, which raises attack complexity. See the Black Duck Security Advisory CVE-2026-8338 for vendor-supplied technical detail.

// No verified exploit code is publicly available for CVE-2026-8338.
// Refer to the Black Duck Security Advisory for technical details.

Detection Methods for CVE-2026-8338

Indicators of Compromise

Unauthenticated HTTP requests to Coverity Connect API endpoints returning 200 OK responses containing project or defect data.
Access log entries showing API calls without an associated authenticated session identifier or JSESSIONID cookie.
Anomalous request patterns targeting Spring MVC controller paths that are normally reached only after login.

Detection Strategies

Review Coverity Connect access logs for requests to API paths that lack authentication headers or session cookies but still receive successful responses.
Correlate web server logs with application audit logs to identify data reads that have no corresponding user login event.
Deploy a web application firewall (WAF) rule to flag requests to Coverity API endpoints from source IPs outside the expected administrator or CI/CD network ranges.

Monitoring Recommendations

Forward Coverity Connect access, application, and audit logs to a centralized SIEM for correlation and retention.
Alert on spikes in API request volume, particularly to endpoints returning JSON payloads containing project or defect data.
Monitor egress from the Coverity Connect host for large or unusual data transfers to external destinations.

How to Mitigate CVE-2026-8338

Immediate Actions Required

Upgrade Coverity Connect to a fixed release identified in the Black Duck Security Advisory CVE-2026-8338.
Restrict network access to the Coverity Connect web interface to trusted management networks and CI/CD systems.
Audit access logs for the period preceding the upgrade to identify any prior unauthorized API access.

Patch Information

Black Duck has published a security advisory for CVE-2026-8338 describing the affected versions and remediation guidance. Administrators should consult the vendor advisory for the specific patched build numbers and upgrade instructions applicable to their Coverity Connect deployment. All versions between 2023.6.0 and 2026.3.0 inclusive should be considered vulnerable until upgraded.

Workarounds

Place Coverity Connect behind a reverse proxy that enforces authentication before requests reach the application.
Use network segmentation and firewall rules to limit HTTP access to Coverity Connect to a defined set of source addresses.
Rotate API tokens, service account credentials, and any secrets that may have been exposed through Coverity Connect if unauthorized access is suspected.

bash

# Example: restrict inbound HTTPS access to Coverity Connect using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP