Integer Truncation Vulnerability in LIBPNG by PNG Group
CVE-2026-22801

6.8MEDIUM

Key Information:

Vendor

Pnggroup

Status
Libpng
Vendor
CVE Published:
12 January 2026

What is CVE-2026-22801?

The LIBPNG library, utilized for handling PNG image files, contains an integer truncation vulnerability that leads to potential heap buffer over-reads. This issue arises within the simplified write API functions, specifically png_write_image_16bit and png_write_image_8bit, when afflicted by negative row stride values or strides that exceed 65535 bytes. The defect was introduced in version 1.6.26 and affects multiple versions up to 1.6.53, due to adjustments made to eliminate compiler warnings on 16-bit systems. Resolution for this vulnerability is included in version 1.6.54.

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Affected Version(s)

libpng < 1.6.54

References

https://github.com/pnggroup/libpng/security/advisories/GH...
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CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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