CVE-2026-48329: Adobe ColdFusion Auth Bypass Vulnerability

CVE-2026-48329 Overview

CVE-2026-48329 is an Insufficient Session Expiration vulnerability [CWE-613] affecting Adobe ColdFusion 2023 and ColdFusion 2025. The flaw allows a high-privileged attacker to bypass security measures and gain unauthorized write access to the affected application. Exploitation occurs over the network and does not require user interaction.

Adobe published a security advisory tracked as APSB26-82 addressing the issue. While the CVSS base score is low, the vulnerability weakens session lifecycle controls that ColdFusion administrators rely on for isolating authenticated activity.

Critical Impact
A high-privileged authenticated attacker can reuse or extend session validity beyond expected limits to bypass security feature enforcement and perform unauthorized writes against ColdFusion 2023 and 2025 instances.

Affected Products

Adobe ColdFusion 2023 (base release through Update 21)
Adobe ColdFusion 2025 (base release through Update 10)
Deployments exposing the ColdFusion Administrator or authenticated application endpoints to the network

Discovery Timeline

2026-07-14 - CVE-2026-48329 published to the National Vulnerability Database
2026-07-15 - Last updated in NVD database
2026-07-20 - EPSS score published at 0.33% (percentile 25.263)

Technical Details for CVE-2026-48329

Vulnerability Analysis

The weakness is classified under [CWE-613] Insufficient Session Expiration. ColdFusion does not sufficiently invalidate authenticated sessions when expected lifecycle events occur, allowing previously issued session tokens to remain valid longer than the application logic requires.

Because the flaw requires high privileges to exploit, the attacker must already possess credentials or a valid session for a privileged ColdFusion account. From that position, the attacker can leverage the lingering session state to bypass a security control and reach write-capable functionality that should have been re-authenticated or gated.

The integrity impact is limited but real: unauthorized writes into ColdFusion-managed data or configuration can undermine trust in application state without necessarily disclosing information or degrading availability.

Root Cause

The root cause is improper enforcement of session termination and expiration semantics inside ColdFusion 2023 and 2025. Session identifiers or authentication context remain accepted after the point at which the server should have revoked them, so security checks that assume a fresh authentication decision can be bypassed.

Attack Vector

The attack vector is network-based against the ColdFusion application. An attacker who has obtained or is operating with high-privileged credentials reuses a session that ColdFusion has failed to expire, then invokes a protected write operation. No user interaction is required, and no additional user must be tricked into performing an action.

No public proof-of-concept, exploit code, or CISA KEV listing exists for this issue as of publication. See the Adobe ColdFusion Security Advisory (APSB26-82) for authoritative technical details.

Detection Methods for CVE-2026-48329

Indicators of Compromise

Administrator or privileged ColdFusion sessions that remain active well beyond configured sessiontimeout values in Application.cfc or Application.cfm.
Reuse of the same CFID/CFTOKEN or JSESSIONID value across widely separated timestamps or across differing source IP addresses.
Successful writes to ColdFusion Administrator settings, scheduled tasks, datasources, or mappings from sessions that were not recently re-authenticated.

Detection Strategies

Correlate ColdFusion access logs with authentication events to identify session tokens that outlive expected expiration windows.
Alert on privileged write actions (datasource creation, scheduled task changes, mapping updates) originating from sessions older than the configured maximum lifetime.
Monitor for anomalous geolocation or user-agent changes tied to a single persistent session identifier.

Monitoring Recommendations

Forward ColdFusion application, Administrator, and web server logs to a centralized analytics platform for retention and correlation.
Enable audit logging for the ColdFusion Administrator and track all configuration write operations by user and session ID.
Track failed and successful logins against ColdFusion Administrator accounts to detect prerequisite credential compromise.

How to Mitigate CVE-2026-48329

Immediate Actions Required

Apply the ColdFusion updates published in Adobe advisory APSB26-82 to all ColdFusion 2023 and 2025 installations.
Rotate credentials for ColdFusion Administrator and any high-privileged application accounts, then invalidate existing sessions.
Restrict network access to the ColdFusion Administrator interface so that only trusted management networks can reach it.

Patch Information

Adobe addresses CVE-2026-48329 in the security update described in APSB26-82. The advisory covers ColdFusion 2023 (through Update 21) and ColdFusion 2025 (through Update 10). Administrators should install the vendor-recommended update for their release and verify the build number after patching.

Workarounds

Reduce sessiontimeout and applicationtimeout values in Application.cfc so idle sessions expire more quickly.
Explicitly invalidate sessions on logout using sessionInvalidate() and clear CFID, CFTOKEN, and JSESSIONID cookies.
Enforce re-authentication before privileged administrative write operations where feasible.
Place the ColdFusion Administrator behind a VPN or IP allow-list until patches are deployed.

bash

# Example Application.cfc session hardening
component {
    this.name = "MyApp";
    this.sessionManagement = true;
    this.sessionTimeout = createTimeSpan(0, 0, 15, 0);   // 15 minutes
    this.applicationTimeout = createTimeSpan(0, 1, 0, 0); // 1 hour
    this.setClientCookies = true;
    this.loginStorage = "session";

    function onSessionEnd(sessionScope, applicationScope) {
        // Ensure server-side cleanup on expiration
        structClear(sessionScope);
    }
}