ggml-org llama — Vulnerability (CVE-2026-2069)
Date: 2026-02
Attack vector: other
Category: vulnerability-disclosure
Severity: Low
CVE: CVE-2026-2069
CWE: CWE-119
CWE-121
CVSS: 3.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)

A flaw has been found in ggml-org llama.cpp up to 55abc39. Impacted is the function llama_grammar_advance_stack of the file llama.cpp/src/llama-grammar.cpp of the component GBNF Grammar Handler. This manipulation causes stack-based buffer overflow. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 18993. To fix this issue, it is recommended to deploy a patch.


Mitigations:

Architectural layers (MAESTRO):