CVE-2026-119719

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CVE-2026-119719

Summary: Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Thumbnail Extraction

Details: Blender before 4.5.15 and 5.x before 5.2.3 contains a heap buffer overflow vulnerability in the blend file thumbnail extractor caused by 32-bit integer overflow in thumb_data_vertical_flip(). Attackers can craft a .blend file with malicious TEST block dimensions that trigger an out-of-bounds write when blender-thumbnailer or the Windows shell extension previews it, causing crashes or code execution.

References: https://projects.blender.org/blender/blender, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119719.json, https://nvd.nist.gov/vuln/detail/CVE-2026-119719, https://www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-buffer-overflow-via-thumbnail-extraction, https://projects.blender.org/blender/blender/commit/71c10a0217d5e331b215b76773ad23b64974bd97, https://projects.blender.org/blender/blender/commit/d723c68112d216099c9b24dab5c8440bab7add08, https://projects.blender.org/blender/blender/pulls/164279