CVE-2026-33328
Received Received - Intake

Integer Overflow in libvips gifload Operation on 32-bit Systems

Publication date: 2026-07-20

Last updated on: 2026-07-20

Assigner: GitHub, Inc.

Description
libvips is a fast image processing library with low memory needs. On 32-bit systems in versions before and including 8.18.0, the `gifload` operation could incorrectly determine dimensions leading to an integer overflow. This has been patched in version 8.18.1.

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Meta Information

Published
2026-07-20
Last Modified
2026-07-20
Generated
2026-07-21
AI Q&A
2026-07-20
EPSS Evaluated
N/A
NVD
CVE-2026-33328
EUVD
EUVD-2026-46001

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
libvips libvips to 8.18.0 (inc)
libvips libvips 8.18.1

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

CVE-2026-33328 is an integer overflow vulnerability in libvips, an image processing library. On 32-bit systems running versions before 8.18.1, the gifload operation incorrectly calculates image dimensions, leading to potential overflows. This can cause crashes or undefined behavior when processing GIF files.

Detection Guidance

To detect this vulnerability, check the installed version of libvips on your system. Run: vips --version. If the version is 8.18.0 or earlier, the system is vulnerable. Additionally, inspect GIF files processed by libvips for crashes or incorrect dimension handling.

Impact Analysis

This vulnerability may allow attackers with local access and low privileges to crash applications using libvips or trigger undefined behavior by exploiting the integer overflow in GIF processing. It primarily affects system availability and stability.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it is a technical flaw in image processing that could lead to crashes or undefined behavior on 32-bit systems. Compliance impacts would depend on how the affected library is used in systems handling regulated data.

Mitigation Strategies

Upgrade libvips to version 8.18.1 or later immediately. As a temporary workaround, block the VipsForeignLoadNsgif operation using vips_operation_block_set to prevent the gifload operation from executing.

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