Buffer overflow in Lightgbm-Org Lightgbm
CVE-2026-92786
LightGBM through 4.7.0 fails to validate child and split array values when parsing text models, allowing attackers to write out-of-bounds memory during SHAP prediction. Attackers can craft malicious model files with invalid node references that trigger out-of-bounds writes at attacker-chosen offsets in the leaf_depth_ buffer during feature contribution computation.
Vulnerability class: Buffer 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
EPSS: 0.002 (8.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/lightgbm-org/LightGBM/issues/7357 (issue-tracking)
- github.com/lightgbm-org/LightGBM (product)
- github.com/lightgbm-org/LightGBM/blob/v4.6.0/include/LightGBM/tree.h (technical-description)
- github.com/lightgbm-org/LightGBM/blob/v4.6.0/src/io/tree.cpp (technical-description)
- www.vulncheck.com/advisories/lightgbm-through-4.7.0-out-of-bounds-write-via-cra… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92786?
- CVE-2026-92786 is a high-severity vulnerability in Lightgbm-Org Lightgbm, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-09-16.
- How severe is CVE-2026-92786?
- High severity. CVSS v3 base score is 7.8 out of 10.