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CVE-2026-19082— 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

Quick assessment

Affected
TONYC Imager
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TONYC Imager是TONYC个人开发者的一款嵌入式服务器。 TONYC Imager 0.45_02至1.034之前版本存在缓冲区错误漏洞，该漏洞源于copy_string_tags函数处理零计数ASCII EXIF条目时长度计算错误，导致strlen()越界读取相邻堆字节，攻击者可通过特制图像获取相邻堆字节信息。

AI Predicted 7.5 Difficulty: Easy EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1115 · Clipboard Data

Affected Version Matrix 1

VendorProduct Version RangeStatus
TONYC Imager 0.45_02< 1.034 affected
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I. Basic Information for CVE-2026-19082

Vulnerability Information
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Vulnerability Title
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
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
TONYC Imager 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TONYC Imager是TONYC个人开发者的一款嵌入式服务器。 TONYC Imager 0.45_02至1.034之前版本存在缓冲区错误漏洞，该漏洞源于copy_string_tags函数处理零计数ASCII EXIF条目时长度计算错误，导致strlen()越界读取相邻堆字节，攻击者可通过特制图像获取相邻堆字节信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TONYC Imager 0.45_02 ~ 1.034 -

II. Public POCs for CVE-2026-19082

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III. Intelligence Information for CVE-2026-19082

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Vendor Advisories for CVE-2026-19082 (1)

IV. Related Vulnerabilities

Same product: Imager
Same vendor: TONYC
Same weakness: CWE-125

V. Comments for CVE-2026-19082

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