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CVE-2026-119719

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

publishedCWE-190

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.

Technical severity8.5 highCVSS 4.0 · CNA: VulnCheck

Published2026-10-30Source updated 2026-11-04

Collected2026-11-053 attributed sources

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: VulnCheck

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: VulnCheck

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: VulnCheck

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: [email protected]

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: [email protected]

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: [email protected]

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Blender Blender Foundation	≥ 0; < 4.5.15 (affected, semver) ≥ 5.0.0; < 5.2.3 (affected, semver) Other versions: unaffected	CNA: VulnCheck

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (1)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:blender:blender:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "4.5.15",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:blender:blender:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "5.2.3",
            "versionStartIncluding": "5.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 8.5 high	`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`	CNA: VulnCheck
3.1 / 7.8 high	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`	CNA: VulnCheck
4.0 / 8.5 high	`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X`	NVD: [email protected]
3.1 / 7.8 high	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`	NVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://projects.blender.org/blender/blender/pulls/164279CNA: VulnCheck · patch
https://projects.blender.org/blender/blender/commit/d723c68112d216099c9b24dab5c8440bab7add08CNA: VulnCheck · patch
https://projects.blender.org/blender/blender/commit/71c10a0217d5e331b215b76773ad23b64974bd97CNA: VulnCheck · patch
https://projects.blender.org/blender/blenderCNA: VulnCheck · product
https://www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-buffer-overflow-via-thumbnail-extractionCNA: VulnCheck · third-party-advisory
https://projects.blender.org/blender/blender[email protected] · Product
https://projects.blender.org/blender/blender/commit/71c10a0217d5e331b215b76773ad23b64974bd97[email protected] · Patch
https://projects.blender.org/blender/blender/commit/d723c68112d216099c9b24dab5c8440bab7add08[email protected] · Patch
https://projects.blender.org/blender/blender/pulls/164279[email protected] · Issue Tracking, Patch
https://www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-buffer-overflow-via-thumbnail-extraction[email protected] · Third Party Advisory

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