CVE-2026-115801 Details
Description
A security flaw has been discovered in Kakao khaiii up to 0.4. The impacted element is the function khaiii::nn::Linear::open of the file src/main/cpp/khaiii/nn/Linear.cpp of the component JSON Config File Handler. The manipulation of the argument hidden_dim/class_num results in out-of-bounds read. The attack requires a local approach. The exploit has been released to the public and may be used for attacks. The vendor explains: "khaiii treats the resource directory (--rsc-dir) as trusted input, like a binary or a shared library. To use this defect, an attacker must already be able to write to that directory. With that access, an attacker can change the analysis results without this defect." This vulnerability only affects products that are no longer supported by the maintainer.
A security vulnerability allowing out-of-bounds read has been identified in Kakao Khaiii versions through 0.4. The issue arises in the JSON Config File Handler, specifically within the function 'khaiii::nn::Linear::open' in 'src/main/cpp/khaiii/nn/Linear.cpp'. The vulnerability is triggered by a 32-bit integer overflow in the dimensions 'hidden_dim' and 'class_num', which allows a crafted model file to bypass size checks and cause a segmentation fault during processing. This flaw requires local access to exploit, as it involves manipulating files in a trusted resource directory.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 23, 2026CISA-ADP
Assessed Oct 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/kakao/khaiii/ | [email protected] | ProductSource CodeVendor |
| https://github.com/kakao/khaiii/issues/129 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/user-attachments/files/33260270/poc.zip | [email protected] | Broken LinkExploit |
| https://vuldb.com/cve/CVE-2026-115801 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1022283 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/425983 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/425983/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Kakao khaiii | <= 0.4 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 29, 2026 | CVE Modified | CISA-ADP |
| Oct 23, 2026 | New CVE Received | [email protected] |
Volerion