Vulnerability · Published Sep 29, 2026 · Assigned by VulnCheck
CVE-2026-102567CTranslate2 before 4.8.1 Out-of-Bounds Read via Model Deserialization
Medium 6.1
In plain English
A medium-severity out-of-bounds read in CTranslate2 from OpenNMT. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.1%top 98.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
CTranslate2 before 4.8.1 contains an out-of-bounds heap read vulnerability in the binary model loader when deserializing string fields without null terminators. Attackers can craft malicious model files to trigger heap memory reads past buffer boundaries, causing crashes or disclosing adjacent heap memory contents.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OpenNMT | CTranslate2 | 0 – before 4.8.1 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- Pull Request #2068 issue-tracking, patch
- Patch Commit patch
- https://github.com/OpenNMT/CTranslate2/blob/v4.8.0/src/models/model.cc#L81-L87 technical-description
- CTranslate2 v4.8.1 Release Notes release-notes
- https://github.com/OpenNMT/CTranslate2 product
- VulnCheck Advisory: CTranslate2 before 4.8.1 Out-of-Bounds Read via Model Deserialization third-party-advisory