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…
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 thumbdataverticalflip(). 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.
Assessment
- CVSS
- 8.5 (v4.0)
- Severity
- High
- EPSS
- 0.16% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 30 October 2026
- Last updated
- 4 November 2026
- Affected
- Blender Foundation · Blender
- Weakness
- CWE-190
- Assigner
- disclosure@vulncheck.com
CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
At the source
References
- https://projects.blender.org/blender/blender
- https://projects.blender.org/blender/blender/commit/71c10a0217d5e331b215b76773ad23b64974bd97
- https://projects.blender.org/blender/blender/commit/d723c68112d216099c9b24dab5c8440bab7add08
- https://projects.blender.org/blender/blender/pulls/164279
- https://www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-buffer-overflow-via-thumbnail-extraction
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