CVE-2026-27289: Adobe Photoshop RCE Vulnerability

CVE-2026-27289 Overview

CVE-2026-27289 is an out-of-bounds read vulnerability affecting Adobe Photoshop Desktop versions 27.4 and earlier. The vulnerability occurs when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Critical Impact

Successful exploitation allows arbitrary code execution in the context of the current user through a maliciously crafted file, potentially leading to full system compromise.

Affected Products

• Adobe Photoshop Desktop versions 27.4 and earlier
• Apple macOS (all supported versions running affected Photoshop)
• Microsoft Windows (all supported versions running affected Photoshop)

Discovery Timeline

• 2026-04-14 - CVE-2026-27289 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2026-27289

Vulnerability Analysis

This vulnerability is classified as CWE-125 (Out-of-Bounds Read), a memory corruption flaw that occurs when Adobe Photoshop attempts to parse specially crafted files. During the file parsing process, the application reads data from a memory location that falls outside the bounds of the allocated buffer. While out-of-bounds read vulnerabilities often lead to information disclosure, in this case the vulnerability can be leveraged to achieve arbitrary code execution.

The attack requires local access and user interaction—specifically, a victim must be tricked into opening a maliciously crafted file. This attack pattern is commonly seen in targeted spear-phishing campaigns where attackers send convincing emails with attached malicious files designed to appear legitimate.

Root Cause

The root cause of this vulnerability lies in improper bounds checking within Adobe Photoshop's file parsing routines. When processing certain file structures, the application fails to properly validate the size or offset values before reading memory, allowing an attacker to craft a file that triggers reads beyond the allocated memory buffer. This can lead to memory corruption conditions that enable code execution.

Attack Vector

The attack vector for CVE-2026-27289 is local, requiring user interaction. An attacker must craft a malicious file (likely an image or Photoshop-specific format) and convince the victim to open it. Common delivery methods include:

• Email attachments disguised as legitimate project files
• Drive-by downloads from compromised websites
• Files shared through cloud storage or collaboration platforms
• Social engineering via messaging platforms

Once the victim opens the malicious file in Adobe Photoshop, the out-of-bounds read condition is triggered during file parsing, potentially allowing the attacker to execute arbitrary code with the privileges of the current user.

The vulnerability affects both Windows and macOS platforms where vulnerable versions of Adobe Photoshop are installed. Given that creative professionals often work with files from external sources, the attack surface for this vulnerability is significant in enterprise environments using Adobe Creative Cloud products.

Detection Methods for CVE-2026-27289

Indicators of Compromise

• Unexpected crashes or abnormal behavior in Adobe Photoshop when opening files from untrusted sources
• Unusual process spawning from Photoshop.exe or Adobe Photoshop processes
• Memory access violations logged in system event logs associated with Adobe Photoshop
• Suspicious file types or unusually structured files appearing in download or temp directories

Detection Strategies

• Monitor endpoint detection and response (EDR) solutions for anomalous behavior from Adobe Photoshop processes
• Implement application control policies to detect unauthorized code execution originating from Photoshop
• Deploy SentinelOne Singularity to detect and block exploitation attempts through behavioral AI analysis
• Configure email security gateways to scan and sandbox suspicious file attachments before delivery

Monitoring Recommendations

• Enable enhanced logging for Adobe Creative Cloud applications on endpoints
• Monitor for child process creation from Adobe Photoshop that deviates from normal behavior patterns
• Track file access patterns to identify potential malicious file delivery attempts
• Implement network monitoring for unusual outbound connections following Photoshop usage

How to Mitigate CVE-2026-27289

Immediate Actions Required

• Update Adobe Photoshop Desktop to the latest patched version immediately
• Educate users about the risks of opening files from untrusted or unknown sources
• Enable automatic updates for Adobe Creative Cloud applications
• Consider restricting Photoshop file associations temporarily until patches are applied

Patch Information

Adobe has released a security update addressing this vulnerability. Detailed patch information is available in the Adobe Photoshop Security Advisory (APSB26-40). Organizations should apply the security update to all affected systems as soon as possible. The patch addresses the improper bounds checking in file parsing routines that allowed the out-of-bounds read condition.

Workarounds

• Implement strict file handling policies to prevent users from opening untrusted files in Adobe Photoshop
• Deploy application sandboxing solutions to isolate Adobe Photoshop from critical system resources
• Configure email filters to quarantine potentially dangerous file attachments pending review
• Use virtual machines or isolated environments for processing files from unknown sources

Organizations should prioritize patching as workarounds provide limited protection against sophisticated attacks targeting this vulnerability.