CVE-2026-27610: Parse Dashboard Key Disclosure Flaw

CVE-2026-27610 Overview

Parse Dashboard is a standalone dashboard for managing Parse Server apps. A cache key collision vulnerability exists in the ConfigKeyCache component that affects versions 7.3.0-alpha.42 through 9.0.0-alpha.7. The vulnerability occurs because the cache uses the same key for both master key and read-only master key when resolving function-typed keys, leading to potential privilege escalation or privilege reduction under specific timing conditions.

Critical Impact

Under specific timing conditions, a read-only user can receive the cached full master key (privilege escalation), or a regular user can receive the cached read-only master key (unintended privilege reduction). This represents a significant authorization bypass in Parse Dashboard deployments.

Affected Products

• Parse Dashboard versions 7.3.0-alpha.42 through 9.0.0-alpha.7
• Parse Server apps managed through affected Parse Dashboard versions
• Deployments using function-typed master keys with agent configuration

Discovery Timeline

• February 25, 2026 - CVE-2026-27610 published to NVD
• February 25, 2026 - Last updated in NVD database

Technical Details for CVE-2026-27610

Vulnerability Analysis

This vulnerability is classified under CWE-1289 (Improper Validation of Unsafe Equivalence in Input). The core issue lies in the ConfigKeyCache implementation within Parse Dashboard, which fails to differentiate between master key and read-only master key entries when caching function-typed key resolutions.

When a user authenticates to Parse Dashboard, the system resolves their credentials against the configuration. For deployments using function-typed master keys (where the key is dynamically generated rather than statically configured), the ConfigKeyCache caches these resolved values for performance optimization. However, the cache key generation algorithm does not account for the privilege level distinction, resulting in both key types sharing an identical cache entry identifier.

Root Cause

The root cause is an improper cache key design in the ConfigKeyCache component. When function-typed keys are used, the cache stores the resolved key value using a cache identifier that does not incorporate the key type (master vs. read-only master). This architectural flaw means that under certain timing conditions—such as when two users with different privilege levels authenticate in close succession—the cache may return the wrong key type to a requesting user.

The fix implemented in version 9.0.0-alpha.8 introduces distinct cache keys for master key and read-only master key, ensuring proper isolation between privilege levels.

Attack Vector

The attack vector requires network access and relies on specific timing conditions. An authenticated user with low privileges (read-only) could potentially receive the full master key from the cache if a privileged user's key was recently cached. The attack complexity is high due to the timing-dependent nature of the race condition.

The exploitation scenario involves:

1. A legitimate user with full master key access authenticates and their function-typed key is cached
2. Shortly after, a read-only user authenticates using function-typed keys
3. Due to the cache key collision, the read-only user receives the full master key
4. The attacker now has elevated privileges within the Parse Dashboard

This race condition vulnerability requires specific timing alignment and the use of function-typed master keys in the configuration.

Detection Methods for CVE-2026-27610

Indicators of Compromise

• Unexpected privilege elevation events in Parse Dashboard audit logs
• Read-only users performing administrative operations they should not have access to
• Anomalous authentication patterns with rapid successive logins from different privilege levels
• Configuration changes made by users who should only have read-only access

Detection Strategies

• Monitor Parse Dashboard logs for authorization anomalies where read-only users access master-key-only endpoints
• Implement alerting on any administrative actions performed by read-only accounts
• Review authentication timing patterns for rapid successive logins that could trigger the race condition
• Audit Parse Server data modifications for unexpected changes from read-only dashboard users

Monitoring Recommendations

• Enable verbose logging for ConfigKeyCache operations to track cache hits and misses
• Implement real-time monitoring of privilege level changes during authentication flows
• Set up alerts for any master key operations initiated by accounts configured as read-only
• Review dashboard access logs regularly for authentication timing anomalies

How to Mitigate CVE-2026-27610

Immediate Actions Required

• Upgrade Parse Dashboard to version 9.0.0-alpha.8 or later immediately
• Audit recent dashboard activity for any signs of privilege escalation
• Review all function-typed master key configurations in your deployment
• If unable to upgrade immediately, implement the workarounds described below

Patch Information

The vulnerability has been patched in Parse Dashboard version 9.0.0-alpha.8. The fix implements distinct cache keys for master key and read-only master key, eliminating the cache collision vulnerability. The patch is available via the GitHub release and can be reviewed in the commit changes. Additional details are available in the GitHub Security Advisory GHSA-jhp4-jvq3-w5xr.

Workarounds

• Avoid using function-typed master keys in your Parse Dashboard configuration; use static string-based keys instead
• Remove the agent configuration block from your dashboard configuration file
• Implement network-level access controls to limit who can access the Parse Dashboard
• Consider running separate dashboard instances for different privilege levels as a temporary measure

# Example: Remove agent configuration block from parse-dashboard-config.json
# Before (vulnerable configuration):
# {
#   "apps": [...],
#   "agent": {
#     "masterKey": function() { ... }
#   }
# }

# After (mitigated configuration - use static keys):
# {
#   "apps": [...],
#   "masterKey": "your-static-master-key"
# }

# Or upgrade to the patched version:
npm install parse-dashboard@9.0.0-alpha.8