Heap-memory disclosure via zero-length EXIF underflow
Published Aug 7, 2026 · Updated Aug 7, 2026
Out-of-bounds reads in Tony Cook Imager 0.45_02 through 1.033 allow remote attackers to expose adjacent heap bytes via crafted images. In copy_string_tags, a zero-count ASCII EXIF entry makes entry->size - 1 become -1, causing i_tags_add to call strlen and copy bytes beyond the declared entry. The path requires an application to decode an attacker-supplied JPEG or WEBP image and access the resulting exif_* tag; the demonstrated consequence is unintended tag data, not code execution.
Summary
What happened
Out-of-bounds reads in Tony Cook Imager 0.45_02 through 1.033 allow remote attackers to expose adjacent heap bytes via crafted images. In copy_string_tags, a zero-count ASCII EXIF entry makes entry->size - 1 become -1, causing i_tags_add to call strlen and copy bytes beyond the declared entry. The path requires an application to decode an attacker-supplied JPEG or WEBP image and access the resulting exif_* tag; the demonstrated consequence is unintended tag data, not code execution.
The record
- CVE
- CVE-2026-19082
- Published
- Aug 7, 2026
- Updated
- Aug 7, 2026
- Vendor
- Tony Cook
- Product
- Imager
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 7, 2026CVE publishedPublication date reported by the CVE source.
- Aug 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0.45_02 <1.034
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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