CVE-2026-48367: Adobe After Effects RCE Vulnerability

CVE-2026-48367 Overview

Adobe After Effects contains an out-of-bounds write vulnerability [CWE-787] that enables arbitrary code execution in the context of the current user. Exploitation requires the victim to open a maliciously crafted file, making this a user-interaction-dependent local attack.

An attacker who succeeds gains the same privileges as the logged-in user. On workstations where creative professionals operate with elevated rights, this can lead to full system compromise. The vulnerability affects Adobe After Effects and was disclosed in Adobe security bulletin APSB26-78.

Critical Impact
Successful exploitation results in arbitrary code execution under the current user's context, enabling malware installation, data theft, and lateral movement from creative workstations.

Affected Products

Adobe After Effects (versions listed in APSB26-78)
Adobe After Effects on Windows
Adobe After Effects on macOS

Discovery Timeline

2026-07-14 - CVE-2026-48367 published to NVD
2026-07-17 - Last updated in NVD database

Technical Details for CVE-2026-48367

Vulnerability Analysis

The flaw is an out-of-bounds write [CWE-787] within Adobe After Effects file parsing logic. When After Effects processes a malformed project or media file, the application writes data past the boundary of an allocated buffer. This memory corruption can overwrite adjacent structures, function pointers, or control-flow metadata.

An attacker who controls the out-of-bounds write can steer execution into attacker-supplied shellcode or hijack existing execution paths. Because After Effects handles a wide range of composition, project, and media formats, the parser attack surface is broad. The vulnerability requires local file access, meaning the malicious file must reach the victim through email, download, shared storage, or a compromised asset repository.

Root Cause

The root cause is insufficient bounds validation during the parsing of an untrusted file structure. The affected code path calculates or trusts a size or offset field from the input file without validating it against the destination buffer. Adobe has not published a technical breakdown of the specific parser component. Refer to the Adobe After Effects Security Advisory for authoritative details.

Attack Vector

Exploitation follows a client-side file-open workflow. The attacker crafts a malicious After Effects project, template, or media asset and delivers it to a target. When the victim opens the file in After Effects, the parser triggers the out-of-bounds write. Common delivery channels include phishing attachments, trojanized project templates on stock asset marketplaces, and supply-chain injection into shared production pipelines.

The vulnerability requires no network access to the victim system and no prior authentication to After Effects. It cannot be triggered remotely without user interaction.

Detection Methods for CVE-2026-48367

Indicators of Compromise

Unexpected child processes spawned by AfterFX.exe or the macOS After Effects binary, particularly command interpreters such as cmd.exe, powershell.exe, or /bin/sh.
Adobe After Effects crashes or exception logs correlated with opening a specific project or media file.
After Effects processes performing network connections to unfamiliar hosts or writing executables to disk.

Detection Strategies

Monitor process lineage for After Effects spawning script interpreters, LOLBins, or persistence utilities.
Alert on file writes by After Effects to autostart locations, scheduled tasks, or user profile executable directories.
Inspect telemetry for anomalous memory allocation patterns or module loads inside the After Effects process.

Monitoring Recommendations

Collect endpoint telemetry from creative workstations and forward to a centralized detection platform for correlation.
Enable file provenance tracking to identify which project or asset file preceded suspicious After Effects behavior.
Track After Effects version inventory across the fleet to confirm patched builds are deployed.

How to Mitigate CVE-2026-48367

Immediate Actions Required

Apply the Adobe security update referenced in APSB26-78 to all After Effects installations.
Restrict opening of After Effects project files received from untrusted or unverified sources.
Run After Effects under a standard user account, not an administrator, to limit post-exploitation impact.

Patch Information

Adobe has released a fixed version of After Effects. Consult the Adobe After Effects Security Advisory for the specific patched build numbers and download locations. Deploy the update through Adobe Creative Cloud or your managed software distribution system.

Workarounds

Block inbound email attachments containing After Effects project extensions (.aep, .aet) at the mail gateway until patching completes.
Isolate creative workstations on network segments with restricted egress to limit lateral movement after compromise.
Enforce application allowlisting to prevent unauthorized executables from launching after a successful exploit.

bash

# Verify installed After Effects version on macOS
defaults read "/Applications/Adobe After Effects 2026/Adobe After Effects 2026.app/Contents/Info.plist" CFBundleShortVersionString

# Verify installed After Effects version on Windows (PowerShell)
Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*" |
  Where-Object { $_.DisplayName -like "*After Effects*" } |
  Select-Object DisplayName, DisplayVersion