Integer overflow in Blender Foundation
CVE-2026-119719
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- projects.blender.org/blender/blender/pulls/164279 (patch)
- projects.blender.org/blender/blender/commit/d723c68112d216099c9b24dab5c8440bab7… (patch)
- projects.blender.org/blender/blender/commit/71c10a0217d5e331b215b76773ad23b6497… (patch)
- projects.blender.org/blender/blender (product)
- www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-bu… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119719?
- CVE-2026-119719 is a high-severity vulnerability in Blender Foundation, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-10-30.
- How severe is CVE-2026-119719?
- High severity. CVSS v3 base score is 7.8 out of 10.