Can a computer be infected with malware simply by processing a photo \u2014 particularly if that computer is a Mac, which many still believe (wrongly) to be inherently resistant to malware? As it turns out, the answer is yes \u2014 if you\u2019re using a vulnerable version of ExifTool or one of the many apps built based on it. ExifTool is a ubiquitous open-source solution for reading, writing, and editing image metadata. It\u2019s the go-to tool for photographers and digital archivists, and is widely used in data analytics, digital forensics, and investigative journalism.<\/p>\n
Our GReAT experts discovered a critical vulnerability \u2014 tracked as CVE-2026-3102<\/a> \u2014 which is triggered during the processing of malicious image files containing embedded shell commands within their metadata. When a vulnerable version of ExifTool on macOS processes such a file, the command is executed. This allows a threat actor to perform unauthorized actions in the system, such as downloading and executing a payload from a remote server. In this post, we break down how this exploit works, provide actionable defense recommendations, and explain how to verify if your system is vulnerable.<\/p>\n ExifTool<\/a> is a free, open-source application addressing a niche but critical requirement: it extracts metadata from files, and enables the processing of both that data and the files themselves. Metadata is the information embedded within most modern file formats<\/a> that describes or supplements the main content of a file. For instance, in a music track, metadata includes the artist\u2019s name, song title, genre, release year, album cover art, and so on. For photographs, metadata typically consists of the date and time of a shot, GPS coordinates, ISO and shutter speed settings, and the camera make and model. Even office documents store metadata, such as the author\u2019s name, total editing time, and the original creation date.<\/p>\n ExifTool is the industry leader in terms of the sheer volume of supported file formats, as well as the depth, accuracy, and versatility of its processing capabilities. Common use cases include:<\/p>\n The list goes on and on. ExifTool is available both as a standalone command-line application and an open-source library, meaning its code often runs under the hood of powerful, multi-purpose tools; examples include photo organization systems like Exif Photoworker and MetaScope, or image processing automation tools like ImageIngester. In large digital libraries, publishing houses, and image analytics firms, ExifTool is frequently used in automated mode, triggered by internal enterprise applications and custom scripts.<\/p>\n To exploit this vulnerability, an attacker must craft an image file in a certain way. While the image itself can be anything, the exploit lies in the metadata \u2014 specifically the DateTimeOriginal field (date and time of creation), which must be recorded in an invalid format. In addition to the date and time, this field must contain malicious shell commands. Due to the specific way ExifTool handles data on macOS, these commands will execute only if two conditions are met:<\/p>\n A rare but by no means fantastical scenario for a targeted attack would look like this: a forensics laboratory, a media editorial office, or a large organization that processes legal or medical documentation receives a digital document of interest. This can be a sensational photo or a legal claim \u2014 the bait depends on the victim\u2019s line of work. All files entering the company undergo sorting and cataloging via a digital asset management (DAM) system. In large companies, this may be automated; individuals and small firms run the required software manually. In either case, the ExifTool library must be used under the hood of this software. When processing the date of the malicious photo, the computer where the processing occurs is infected with a Trojan or an infostealer, which is subsequently capable of stealing all valuable data stored on the attacked device. Meanwhile, the victim could easily notice nothing at all, as the attack leverages the image metadata while the picture itself may be harmless, entirely appropriate, and useful.<\/p>\n GReAT researchers reported the vulnerability to the author of ExifTool, who promptly released version 13.50<\/a>, which is not susceptible to CVE-2026-3102. Versions 13.49 and earlier must be updated to remediate the flaw.<\/p>\n It\u2019s critical to ensure that all photo processing workflows are using the updated version. You should verify that all asset management platforms, photo organization apps, and any bulk image processing scripts running on Macs are calling ExifTool version 13.50 or later, and don\u2019t contain an embedded older copy of the ExifTool library.<\/p>\n Naturally, ExifTool \u2014 like any software \u2014 may contain additional vulnerabilities of this class. To harden your defenses, we also recommend the following:<\/p>\n Finally, if you work with freelancers or self-employed contractors (or simply allow BYOD), only allow them to access your network if they have a comprehensive macOS security solution<\/a> installed.<\/p>\n Still think macOS is safe? Then read about these Mac threats:<\/p>\n An in-depth analysis of CVE-2026-3102, a vulnerability posing a potential threat to anyone processing images on a Mac.<\/p>\n","protected":false},"author":312,"featured_media":55364,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1999,3051,3052],"tags":[1946,97,321,422,131,268,4616],"class_list":{"0":"post-55362","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-business","8":"category-enterprise","9":"category-smb","10":"tag-macos","11":"tag-security-2","12":"tag-technology","13":"tag-threats","14":"tag-tips","15":"tag-vulnerabilities","16":"tag-zero-day-vulnerability"},"hreflang":[{"hreflang":"x-default","url":"https:\/\/www.kaspersky.com\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/55362\/"},{"hreflang":"en-in","url":"https:\/\/www.kaspersky.co.in\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/30242\/"},{"hreflang":"en-ae","url":"https:\/\/me-en.kaspersky.com\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/25319\/"},{"hreflang":"ar","url":"https:\/\/me.kaspersky.com\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/13189\/"},{"hreflang":"en-gb","url":"https:\/\/www.kaspersky.co.uk\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/30115\/"},{"hreflang":"es-mx","url":"https:\/\/latam.kaspersky.com\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/29013\/"},{"hreflang":"es","url":"https:\/\/www.kaspersky.es\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/31890\/"},{"hreflang":"it","url":"https:\/\/www.kaspersky.it\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/30502\/"},{"hreflang":"ru","url":"https:\/\/www.kaspersky.ru\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/41398\/"},{"hreflang":"tr","url":"https:\/\/www.kaspersky.com.tr\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/14322\/"},{"hreflang":"fr","url":"https:\/\/www.kaspersky.fr\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/23671\/"},{"hreflang":"pt-br","url":"https:\/\/www.kaspersky.com.br\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/24782\/"},{"hreflang":"de","url":"https:\/\/www.kaspersky.de\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/33247\/"},{"hreflang":"ru-kz","url":"https:\/\/blog.kaspersky.kz\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/30360\/"},{"hreflang":"en-au","url":"https:\/\/www.kaspersky.com.au\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/35999\/"},{"hreflang":"en-za","url":"https:\/\/www.kaspersky.co.za\/blog\/exiftool-macos-picture-vulnerability-mitigation-cve-2026-3102\/35656\/"}],"acf":[],"banners":"","maintag":{"url":"https:\/\/www.kaspersky.com\/blog\/tag\/macos\/","name":"macOS"},"_links":{"self":[{"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts\/55362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/users\/312"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/comments?post=55362"}],"version-history":[{"count":3,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts\/55362\/revisions"}],"predecessor-version":[{"id":55367,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/posts\/55362\/revisions\/55367"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/media\/55364"}],"wp:attachment":[{"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/media?parent=55362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/categories?post=55362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kaspersky.com\/blog\/wp-json\/wp\/v2\/tags?post=55362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}What is ExifTool?<\/h2>\n
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How CVE-2026-3102 works<\/h2>\n
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How to protect against the ExifTool vulnerability<\/h2>\n
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