Act nowDisclosed

Advisory · CVE-2026-105903

Code injection in ColdFusion for low-privilege attackers

ColdFusion improperly controls code generation, so a low-privileged attacker can inject code that the server executes with changed scope. Adobe rates it CVSS 3.1 9.9.

Advisory published October 13, 2026Independent summary
Vendor
Adobe
Product
ColdFusion
Identifier / CWE
CVE-2026-105903
CWE-94
Action timing
Immediate
ELI5

Explain it like I’m five

A modest account can hand ColdFusion text that the server mistakes for its own instructions.

SIMPLIFIED_ATTACK_PATH03 STEPS
  1. 01Reach ColdFusion

    An attacker sends requests to a ColdFusion server.

  2. 02Flaw engaged

    The vulnerable function processes the attacker's input without the control it needed.

  3. 03Code executes

    Arbitrary code runs in the context of the ColdFusion service user.

What happened

Adobe disclosed CVE-2026-105903 in bulletin APSB26-144: an improper control of generation of code vulnerability (CWE-94) in ColdFusion that could result in arbitrary code execution for a low-privileged attacker.

Adobe lists the affected ColdFusion releases in APSB26-144 (the NVD record names the 2023 update line through 2023.0.25, with 2023.0.26 listed as unaffected). Apply the update Adobe provides for your release line.

What to do

  1. Inventory every ColdFusion deployment, including test, training, and individually managed instances.
  2. Apply the vendor fix or upgrade exactly as directed in the linked vendor bulletin or advisory.
  3. Restrict network access to ColdFusion while remediation is underway, especially for internet-facing instances.
  4. Review application and server logs for ColdFusion process spawning unexpected child processes, code-bearing requests in logs, and application files changed outside releases.
  5. Check for accounts, content, or configuration created outside normal change processes, and rotate exposed credentials where access cannot be ruled out.
  6. Verify the deployed version or patch level after remediation.

Management note

Low-privilege code injection on an app server is effectively full server access. Update and inspect the host, not just the application.