CVE-2026-2044 Overview
CVE-2026-2044 is a remote code execution vulnerability affecting GIMP, the popular open-source image manipulation program. The vulnerability exists within the parsing of PGM (Portable GrayMap) image files, where uninitialized memory is accessed during file processing. Remote attackers can exploit this flaw to execute arbitrary code on affected systems, though user interaction is required—the target must either visit a malicious page or open a malicious file containing a specially crafted PGM image.
Critical Impact
Successful exploitation allows attackers to execute arbitrary code in the context of the current GIMP process, potentially leading to full system compromise with the privileges of the user running the application.
Affected Products
- GIMP version 3.0.6
- Earlier versions may also be affected
Discovery Timeline
- 2026-02-20 - CVE-2026-2044 published to NVD
- 2026-02-24 - Last updated in NVD database
Technical Details for CVE-2026-2044
Vulnerability Analysis
This vulnerability stems from CWE-908: Use of Uninitialized Resource, specifically within GIMP's PGM file parsing functionality. When processing a maliciously crafted PGM file, the parser fails to properly initialize memory buffers before accessing them. This creates a condition where attacker-controlled data may influence program execution flow.
The attack requires local access—meaning the malicious file must be opened by the user—but the potential for remote delivery exists through social engineering, email attachments, or malicious websites hosting crafted PGM files. Once the file is opened in GIMP, the uninitialized memory condition can be leveraged to achieve code execution within the context of the GIMP process.
The vulnerability was tracked by the Zero Day Initiative as ZDI-CAN-28158 and publicly disclosed as ZDI-26-118.
Root Cause
The root cause is the lack of proper initialization of memory prior to accessing it during PGM file parsing. When GIMP parses a PGM image file, memory is allocated for processing image data but is not properly initialized before use. This allows an attacker to influence program behavior by crafting a PGM file that exploits the predictable or controllable nature of uninitialized memory contents.
Attack Vector
The attack vector requires user interaction. An attacker must convince a victim to open a malicious PGM file, which can be delivered through:
- Phishing emails with malicious image attachments
- Compromised websites hosting crafted PGM files
- Social engineering to trick users into downloading and opening malicious files
- Supply chain attacks where legitimate image assets are replaced with malicious versions
Once the victim opens the crafted file in GIMP, the uninitialized memory vulnerability is triggered during the parsing phase. The attacker can leverage this condition to achieve arbitrary code execution with the same privileges as the GIMP process.
Detection Methods for CVE-2026-2044
Indicators of Compromise
- Unexpected crashes or abnormal behavior when opening PGM image files in GIMP
- Unusual process spawning from GIMP parent processes
- Suspicious network connections initiated by GIMP processes
- Anomalous file system activity following PGM file operations
Detection Strategies
- Monitor for GIMP processes exhibiting abnormal memory access patterns
- Implement file integrity monitoring for GIMP installation directories
- Deploy endpoint detection rules for suspicious child processes spawned by GIMP
- Use application sandboxing to isolate GIMP from sensitive system resources
Monitoring Recommendations
- Enable verbose logging for image processing applications
- Implement network segmentation to limit potential lateral movement from compromised workstations
- Monitor for unusual PGM file downloads or email attachments
- Deploy SentinelOne agents to detect exploitation attempts through behavioral analysis
How to Mitigate CVE-2026-2044
Immediate Actions Required
- Update GIMP to the latest patched version immediately
- Restrict PGM file processing in high-risk environments until patching is complete
- Educate users about the risks of opening untrusted image files
- Implement application whitelisting to prevent unauthorized code execution
Patch Information
GIMP has released a security patch addressing this vulnerability. The fix ensures proper initialization of memory buffers before they are accessed during PGM file parsing. The patch is available through the official GIMP GitLab merge request.
Organizations should prioritize applying this update to all systems running GIMP, particularly those used for processing external or untrusted image files.
Workarounds
- Avoid opening PGM files from untrusted or unknown sources until the patch is applied
- Use alternative image viewers for PGM files that are not affected by this vulnerability
- Implement network-level filtering to block or quarantine PGM file attachments
- Run GIMP in a sandboxed environment or virtual machine to contain potential exploitation
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
