TONYC Imager up to 1.33 EXIF copy_string_tags heap-based overflow

Summaryinfo

A vulnerability classified as critical was found in TONYC Imager up to 1.33. Affected by this issue is the function copy_string_tags of the component EXIF. Executing a manipulation can lead to heap-based overflow. This vulnerability appears as CVE-2026-19082. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in TONYC Imager up to 1.33 and classified as critical. This vulnerability affects the function copy_string_tags of the component EXIF. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Imager versions from 0.45_02 before 1.034 for Perl may expose adjacent heap bytes via strlen() over-read from zero-count ASCII EXIF entries in copy_string_tags. copy_string_tags() computes an ASCII EXIF tag's length as `entry->size - 1` to strip the trailing NUL. A zero-count ASCII entry sets `entry->size` to 0, and the derived length reaches i_tags_add() as -1, which is interpreted as a request to call strlen(), scanning past the entry to the next NUL and copying those bytes into the tag. JPEG reaches this path via im_decode_exif(), as does the separate Imager::File::WEBP distribution, which is fixed by upgrading Imager. Any caller of Imager->read() on an attacker-supplied image with such an entry may receive an exif_* tag holding adjacent heap bytes instead of an empty string.

The advisory is available at github.com. This vulnerability was named CVE-2026-19082 since 08/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 333381 (Linux Distros Unpatched Vulnerability : CVE-2026-19082), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.034 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (333381). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• TONYC

Name

• Imager

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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