CVE-2026-33327
Received Received - Intake

Heap Buffer Overflow in libvips via vipsload Operation

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. The `vipsload` operation in versions before and including 8.18.0 could incorrectly determine image dimensions leading to an integer overflow and a subsequent heap-based buffer 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-2026-33327
EUVD
EUVD-2026-46000

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-2026-33327 is a high-severity vulnerability in libvips, an image processing library. It involves an integer overflow in the vipsload operation that incorrectly calculates image dimensions, leading to a heap-based buffer overflow. This flaw affects versions up to and including 8.18.0.

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, review applications using libvips for the vipsload operation in image processing workflows.

Impact Analysis

Local attackers with low privileges could exploit this to execute arbitrary code, potentially compromising system integrity and availability. The vulnerability requires no user interaction and has low attack complexity.

Compliance Impact

This vulnerability primarily impacts system integrity and availability due to potential arbitrary code execution. While not directly tied to data privacy, a heap-based buffer overflow could lead to unauthorized data access or corruption, which may violate GDPR or HIPAA if sensitive data is involved. Compliance impact depends on whether the affected system processes regulated data.

Mitigation Strategies

Upgrade libvips to version 8.18.1 or later immediately. Alternatively, block the VipsForeignLoadVips operation via vips_operation_block_set or set the VIPS_BLOCK_UNTRUSTED environment variable to disable untrusted image decoders.

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