CVE-2026-2069
No fix known EPSS <1%CVSS 3.3
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.
Products: ggml-org llama.cpp
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 14 | llama.cpp | no fix |
| Ubuntu 25.10 | llama.cpp | no fix |
| Ubuntu 26.04 LTS | llama.cpp | no fix |
| Ubuntu 26.10 | llama.cpp | no fix |