CVE-2026-2069
lowpriority · track · 0EPSS 0.001 · 4 %ileEUEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.1–4.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (1)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (26)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-2069cnnvd
- https://github.com/ggml-org/llama.cpp/cnnvd
- https://github.com/ggml-org/llama.cpp/issues/18988cnnvd
- https://github.com/ggml-org/llama.cpp/issues/18988#event-4426704865cnnvd
- https://github.com/ggml-org/llama.cpp/pull/18993cnnvd
- https://github.com/ggml-org/llama.cpp/releasesPatchcnnvd
- https://github.com/user-attachments/files/24761101/poc.zipcnnvd
- https://vuldb.com/?ctiid.344636cnnvd
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