CVE-2026-2069

Description

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.

References

https://vuldb.com/?submit.745263

https://vuldb.com/?id.344636

https://vuldb.com/?ctiid.344636

https://github.com/user-attachments/files/24761101/poc.zip

https://github.com/ggml-org/llama.cpp/pull/18993

https://github.com/ggml-org/llama.cpp/issues/18988#event-4426704865

https://github.com/ggml-org/llama.cpp/issues/18988

https://github.com/ggml-org/llama.cpp/

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4