CVE-2026-52491

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Heap Buffer Overflow in libtiff Thumbnail Utility

Publication date: 2026-08-25

Last updated on: 2026-09-09

Assigner: MITRE

Description

An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the libtiff/tools/thumbnail.c: main() component

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-25

Last Modified

2026-09-09

Generated

2026-09-15

AI Q&A

2026-08-26

EPSS Evaluated

2026-09-13

NVD

CVE-2026-52491

Affected Vendors & Products

Vendor	Product	Version / Range
libtiff	libtiff	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is in libtiff, specifically in the thumbnail.c file within the libtiff/tools directory. An attacker can exploit this issue to execute arbitrary code by leveraging a flaw in the main() function of that component.

Impact Analysis

If you use libtiff in your systems or applications, an attacker could exploit this vulnerability to run malicious code on your system. This could lead to unauthorized access, data breaches, or system compromise depending on the privileges of the affected component.

Compliance Impact

This vulnerability may lead to arbitrary code execution, which could result in unauthorized data access or modification. This could violate GDPR's data protection requirements or HIPAA's safeguards for protected health information if exploited.

Mitigation Strategies

Update libtiff to the latest patched version to address the arbitrary code execution flaw in the thumbnail.c component.

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