CVE-2026-25646
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Description
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.
Analysis
Out-of-bounds heap buffer reads in libpng versions prior to 1.6.55 can be triggered through the png_set_quantize() function when processing specially crafted PNG images with specific palette configurations, potentially causing denial of service or information disclosure. Public exploit code exists for this vulnerability, affecting applications that use libpng to process untrusted PNG files. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
24 hours: Inventory all systems and applications using libpng; prioritize production environments and customer-facing services. 7 days: Deploy patches to libpng 1.6.55 or later across all affected systems; test in staging environments first. …
Sign in for detailed remediation steps.
Priority Score
Vendor Status
Share
External POC / Exploit Code
Leaving vuln.today