Security readout for executives and security teams
Plain-English summary
This flaw affects tinyobjloader, a library used to load 3D OBJ files. If an exposed application processes a malicious OBJ file with an affected version, the file may trigger code execution. Business urgency depends on whether untrusted model files reach this parser.
Executive priority
Prioritize if the organization accepts or processes untrusted 3D model files. Otherwise, treat as an important dependency hygiene issue until exposure is confirmed.
Technical view
CVE-2020-28589 is an improper array index validation issue in tinyobjloader LoadObj, mapped to CWE-129. The source bundle identifies v2.0-rc1 and development commit 79d4421 as affected. The CVSS 3.0 score is 9.6 with user interaction required and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely in applications or services that embed tinyobjloader v2.0-rc1 or commit 79d4421 and parse OBJ files from users, partners, downloads, or automated pipelines.
Exploitation context
The provided sources say an attacker can provide a specially crafted file to trigger the issue. KEV is false, and the bundle does not cite active exploitation, public exploit use, or affected downstream products.
Researcher notes
The evidence identifies affected versions, attack precondition, CWE, and CVSS impact. The supplied bundle does not include exact vulnerable code details, a named fixed release, or proof of exploitation, so validation should focus on dependency and data-flow exposure.
Mitigation direction
- Inventory projects and products that include tinyobjloader.
- Check dependency versions or pinned commits against v2.0-rc1 and 79d4421.
- Check upstream or vendor guidance for a fixed version or patch.
- Restrict or quarantine untrusted OBJ file processing until remediated.
- Run file parsing in a sandboxed, least-privilege context where feasible.
Validation and detection
- Search software bills of materials for tinyobjloader.
- Confirm whether LoadObj processes externally supplied OBJ files.
- Verify dependency locks, vendored source, and build artifacts for affected versions.
- Review release notes or vendor advisories before claiming remediation.
- Test patched builds with normal OBJ files for parsing regressions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-129: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-28589 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H2.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.6CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1212CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Validation of Array Index
Improper Validation of Array Index represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.