CVE-2026-64874: CDN Credentials Information Disclosure

CVE-2026-64874 Overview

CVE-2026-64874 describes an information disclosure vulnerability where Content Delivery Network (CDN) credentials were exposed in administrator request URLs. The flaw is categorized under [CWE-200], Exposure of Sensitive Information to an Unauthorized Actor. Attackers with access to URL logs, browser history, referer headers, or proxy records could harvest the embedded credentials. Recovered credentials may allow unauthorized access to CDN configuration, cached content manipulation, or origin server abuse.

Critical Impact
CDN credentials transmitted in URL query strings can be captured by intermediate systems, enabling unauthorized access to CDN infrastructure and downstream content integrity attacks.

Affected Products

Affected product details are Not Available in the published advisory
Vendor identification is Not Available in the enriched data
Refer to the Regular Labs Security Overview for scope and impacted versions

Discovery Timeline

2026-07-23 - CVE-2026-64874 published to NVD
2026-07-23 - Last updated in NVD database

Technical Details for CVE-2026-64874

Vulnerability Analysis

The vulnerability places CDN credentials directly inside URLs generated for administrator requests. URLs are logged by web servers, proxies, load balancers, browser history stores, and analytics platforms. When credentials appear in these URLs, every logging layer becomes a potential credential store. This design pattern violates standard guidance for handling secrets in HTTP transactions.

An attacker who reads server access logs, examines HTTP referer headers on outbound links, or accesses browser history on an administrator workstation can extract the credentials. The exposure does not require exploitation of memory corruption or authentication bypass. It relies purely on the misuse of URL parameters for secret material.

Root Cause

The root cause is transmitting authentication material through the URL query string or path components instead of through request headers or an authenticated body payload. This design choice causes credentials to persist in logs and caches outside the application's control. The advisory does not detail the specific parameter name or endpoint carrying the credential.

Attack Vector

The attack vector is passive credential harvesting from any system that captures full request URLs. Sources include web server access logs, reverse proxy logs, WAF logs, browser history, browser extensions, screen recordings, and third-party services receiving the referer header. An adversary with read access to any of these locations can obtain the CDN credentials without interacting with the target application.

Exploitation code is not applicable for this class of information disclosure. Consult the Regular Labs Security Overview for vendor-provided technical detail.

Detection Methods for CVE-2026-64874

Indicators of Compromise

Web server access log entries containing CDN credential parameters, API keys, or signed tokens in query strings for administrator endpoints
Outbound HTTP referer headers leaking administrator URLs to external analytics or advertising domains
Unexpected CDN API calls originating from IP addresses not associated with the administrator account
Cache purge, origin configuration, or edge rule changes made outside authorized administrator sessions

Detection Strategies

Grep historical web server, proxy, and WAF logs for parameter names associated with CDN authentication tokens
Review CDN provider audit logs for API calls sourced from unfamiliar user agents or geographies
Inspect administrator workstation browser history for URLs containing credential-like query parameters

Monitoring Recommendations

Enable audit logging on the CDN control plane and forward events to a centralized analytics platform
Alert on CDN configuration changes performed outside change-management windows
Rotate CDN API keys on a defined schedule and immediately after any suspected log exposure

How to Mitigate CVE-2026-64874

Immediate Actions Required

Rotate all CDN credentials that may have been transmitted through administrator URLs
Purge historical logs containing the exposed credentials from web servers, proxies, and SIEM stores after forensic review
Audit CDN provider activity logs for unauthorized use of the exposed credentials
Restrict administrator access to the affected application until the vendor patch is applied

Patch Information

Refer to the Regular Labs Security Overview for the current patch status and fixed release information. The enriched CVE data does not list a specific patched version.

Workarounds

Move CDN credentials from URL parameters to request headers or server-side configuration where the vendor supports it
Configure web servers and proxies to redact query strings for administrator endpoints in access logs
Set Referrer-Policy: no-referrer on administrator pages to prevent credential leakage through outbound links
Scope CDN API tokens to the minimum required permissions and restrict source IPs where the CDN provider supports it

bash

# Nginx example: redact query strings from access logs for admin paths
log_format admin_safe '$remote_addr - $remote_user [$time_local] '
                     '"$request_method $uri $server_protocol" '
                     '$status $body_bytes_sent';

location /administrator/ {
    access_log /var/log/nginx/admin.log admin_safe;
    add_header Referrer-Policy "no-referrer" always;
}