Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Thumbnail Extraction
Impact
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.
Source excerpt · VulnCheckAffected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
Blender Foundation · VulnCheck
Blender
2 ranges
Blender Foundation · VulnCheck
Blender
Compare with this publisher’s ranges. This does not inspect your installation.
affected
0 → before 4.5.15
semver versions
5.0.0 → before 5.2.3
semver versions
Other versions: unaffected
Original source description
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.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-119719View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
VulnCheck · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:a:blender:blender:*:*:*:*:*:*:*:*Before: 4.5.15
Vulnerable product
cpe:2.3:a:blender:blender:*:*:*:*:*:*:*:*From (inclusive): 5.0.0
Before: 5.2.3
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:blender:blender:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.5.15"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:blender:blender:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.0.0",
"versionEndExcluding": "5.2.3"
}
]
}
]
}
]Contributing organizations · 1
Assigning organization
What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.