CVE-2026-43893: ExifTool Argument Injection Threatens File Operations
The National Vulnerability Database has detailed CVE-2026-43893, an argument injection vulnerability affecting exiftool-vendored versions prior to 35.19.0. This Node.js wrapper for ExifTool, which operates in a ‘stay_open’ mode, is susceptible to attacker-controlled strings containing line delimiters. These delimiters can split a single intended argument into multiple ExifTool commands.
This flaw, classified with a CVSS score of 8.2 (HIGH), enables attackers to manipulate ExifTool to read arbitrary files accessible to the ExifTool process or write output to attacker-chosen file system paths. While remote code execution has not been demonstrated, the ability to read and write files under the process’s context is a significant vector for further compromise, data exfiltration, or system disruption. The fix addresses this by rejecting line delimiters and NUL bytes in caller-supplied strings.
Organizations leveraging exiftool-vendored in applications that process untrusted input are directly exposed. Attackers can craft malicious input to exploit this vulnerability, potentially gaining unauthorized access to sensitive data or altering system configurations. The implications for data integrity and confidentiality are substantial, demanding immediate patching.
What This Means For You
- If your applications utilize `exiftool-vendored` and handle attacker-controlled strings, you need to patch to version 35.19.0 or later immediately. Audit any systems that process untrusted image metadata or similar file inputs for suspicious ExifTool activity. This isn't just about metadata; it's about an attacker's ability to arbitrarily read and write files on your system. Don't wait for a demonstrated RCE; this is a critical foothold.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-43893: ExifTool Argument Injection via Newline Characters
title: CVE-2026-43893: ExifTool Argument Injection via Newline Characters
id: scw-2026-05-11-ai-1
status: experimental
level: high
description: |
Detects the exploitation of CVE-2026-43893 in exiftool-vendored. This rule specifically looks for the exiftool.js process being invoked with command lines containing newline or carriage return characters, which are used to inject arguments into ExifTool, potentially leading to unauthorized file reads or writes.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-43893/
tags:
- attack.execution
- attack.t1204.002
logsource:
category: process_creation
detection:
selection:
Image|endswith:
- 'exiftool.js'
CommandLine|contains:
- '
'
- '\r'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-43893 | Argument Injection | exiftool-vendored < 35.19.0 |
| CVE-2026-43893 | Information Disclosure | ExifTool process reading attacker-chosen files via argument injection |
| CVE-2026-43893 | Path Traversal | ExifTool process writing to attacker-chosen file system paths via argument injection |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 12, 2026 at 01:22 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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