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CVE-2026-2069

LOW

3.3

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.

CVE Details

CVSS v3.1 Score3.3

SeverityLOW

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published2/6/2026

Last Modified2/9/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-119CWE-121

References

https://github.com/ggml-org/llama.cpp/(cna@vuldb.com)

https://github.com/ggml-org/llama.cpp/issues/18988(cna@vuldb.com)

https://github.com/ggml-org/llama.cpp/issues/18988#event-4426704865(cna@vuldb.com)

https://github.com/ggml-org/llama.cpp/pull/18993(cna@vuldb.com)

https://github.com/user-attachments/files/24761101/poc.zip(cna@vuldb.com)

https://vuldb.com/?ctiid.344636(cna@vuldb.com)

https://vuldb.com/?id.344636(cna@vuldb.com)

https://vuldb.com/?submit.745263(cna@vuldb.com)

IOC Correlations

No correlations recorded

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