Vulnerability 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.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/ggml-org/llama.cpp/
- https://github.com/ggml-org/llama.cpp/issues/18988
- https://github.com/ggml-org/llama.cpp/issues/18988#event-4426704865
- https://github.com/ggml-org/llama.cpp/pull/18993
- https://github.com/user-attachments/files/24761101/poc.zip
- https://vuldb.com/?ctiid.344636
- https://vuldb.com/?id.344636
- https://vuldb.com/?submit.745263
FAQ
What is CVE-2026-2069?
CVE-2026-2069 is a vulnerability with a CVSS score of 3.3 (LOW). 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 ...
How severe is CVE-2026-2069?
CVE-2026-2069 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2069?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.