Critical Security Alert: Adobe Releases Emergency Patches for ColdFusion Due to Multiple CVSS 10.0 Flaws

Adobe has issued an urgent security bulletin, APSB26-68, uncovering a cluster of 11 vulnerabilities affecting both Adobe ColdFusion 2025 and ColdFusion 2023. This isn’t just a routine update; several of these flaws have been assigned the maximum CVSS base score of 10.0, signaling a catastrophic level of risk to affected systems.

Published on June 30, 2026, Adobe has assigned this bulletin a Priority 1 rating. In security operations, this is the highest possible alert level, reserved for vulnerabilities that are either being actively exploited in the wild or represent an imminent, high-impact threat to infrastructure. While Adobe currently reports no evidence of active exploitation, the nature of these flaws means the window for proactive defense is narrow.

Technical Breakdown of the Vulnerabilities

The attack surface presented by these vulnerabilities is extensive. An unauthenticated remote attacker could potentially leverage these flaws to achieve Remote Code Execution (RCE), escalate local privileges, perform arbitrary file system reads, or bypass core security features. In short, a successful exploit could grant an attacker complete, administrative control over the ColdFusion server.

The most devastating flaws—those hitting the 10.0 CVSS threshold—can be categorized into three primary attack vectors:

• Unrestricted File Uploads (CWE-434): CVE-2026-48276 and CVE-2026-48283 allow attackers to upload and execute malicious files directly on the server, bypassing standard security checks.
• Improper Input Validation (CWE-20): Three separate vulnerabilities (CVE-2026-48277, CVE-2026-48281, and CVE-2026-48316) provide a direct pathway for arbitrary code execution without requiring any user interaction or valid credentials.
• Path Traversal (CWE-22): CVE-2026-48282 allows an attacker to navigate the server’s file directory structure, facilitating RCE by accessing restricted system files.

Beyond the “perfect score” vulnerabilities, the bulletin identifies several other high-severity issues that expand the risk profile:

• Privilege Escalation: CVE-2026-48313 (CVSS 9.3) and CVE-2026-48314 (CVSS 6.5) allow attackers to elevate their access levels within the system.
• Server-Side Request Forgery (SSRF): CVE-2026-48307 (CVSS 8.6, CWE-918) enables unauthorized outbound requests from the server, which can be used to bypass security controls or probe internal networks.
• Cross-Site Scripting (XSS): CVE-2026-48315 (CVSS 8.8, CWE-79) allows for arbitrary code execution through a reflected XSS attack, provided the attacker has adjacent network access.

Affected Versions and Remediation Strategy

To secure your environment, identify your current version immediately. The following versions are confirmed to be vulnerable:

• ColdFusion 2025: All versions up to and including Update 9.
• ColdFusion 2023: All versions up to and including Update 20.

Immediate Action Required: Adobe has released the necessary fixes. Administrators should prioritize downloading and deploying ColdFusion 2025 Update 10 or ColdFusion 2023 Update 21.

As an additional layer of defense-in-depth, Adobe recommends that administrators update to the latest MySQL Java Connector and thoroughly review the updated serial filter documentation to mitigate the risk of insecure deserialization attacks.

Credits and Disclosure

These vulnerabilities were identified through responsible disclosure by independent security researchers. Special thanks to Anirudh Anand (a0xnirudh) for reporting CVE-2026-48283 and CVE-2026-48313, and to Matan Sandori (matans1) and 2Bsecure for their contributions via Adobe’s HackerOne bug bounty program regarding CVE-2026-48307.

Final Note for Sysadmins: If your ColdFusion instances are internet-facing, do not delay. Treat this as a critical emergency patch to prevent unauthorized server compromise.