CVE-2026-102566
CVE-2026-102566
CTranslate2 before 4.8.1 contains a heap-based buffer overflow in the binary model loader that fails to validate payload length against allocated buffer size. Attackers can craft malicious model files with oversized payload lengths to write past heap allocation boundaries, causing crashes or arbitrary code execution.
Vulnerability class: Buffer Overflow
Published .
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- github.com/OpenNMT/CTranslate2/pull/2068 (issue-tracking, patch)
- github.com/OpenNMT/CTranslate2/commit/d9b991e0700933a0c05373df8b52ed89cdcab96d (patch)
- github.com/OpenNMT/CTranslate2/blob/v4.8.0/src/models/model.cc (technical-description)
- github.com/OpenNMT/CTranslate2/releases/tag/v4.8.1 (release-notes)
- github.com/OpenNMT/CTranslate2 (product)
- www.vulncheck.com/advisories/ctranslate2-before-4.8.1-heap-buffer-overflow-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-102566?
- CVE-2026-102566 is a high-severity vulnerability, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-09-29.
- How severe is CVE-2026-102566?
- High severity. CVSS v3 base score is 7.8 out of 10.