CVE-2026-2069 (GCVE-0-2026-2069)
Vulnerability from cvelistv5 – Published: 2026-02-06 22:02 – Updated: 2026-02-23 09:28
VLAI
EPSS
VEX
Title
ggml-org llama.cpp GBNF Grammar llama-grammar.cpp llama_grammar_advance_stack stack-based overflow
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-10 15:18 UTC
Assigner
VulDB
CNA
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.344636 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.344636 | signaturepermissions-required |
| https://vuldb.com/?submit.745263 | third-party-advisory |
| https://github.com/ggml-org/llama.cpp/issues/18988 | issue-tracking |
| https://github.com/ggml-org/llama.cpp/issues/1898… | issue-tracking |
| https://github.com/user-attachments/files/2476110… | exploit |
| https://github.com/ggml-org/llama.cpp/pull/18993 | issue-trackingpatch |
| https://github.com/ggml-org/llama.cpp/ | product |
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| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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