{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-2069","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","state":"PUBLISHED","assignerShortName":"VulDB","dateReserved":"2026-02-06T07:41:07.150Z","datePublished":"2026-02-06T22:02:08.933Z","dateUpdated":"2026-02-23T09:28:33.822Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB","dateUpdated":"2026-02-23T09:28:33.822Z"},"title":"ggml-org llama.cpp GBNF Grammar llama-grammar.cpp llama_grammar_advance_stack stack-based overflow","problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-121","lang":"en","description":"Stack-based Buffer Overflow"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-119","lang":"en","description":"Memory Corruption"}]}],"affected":[{"vendor":"ggml-org","product":"llama.cpp","versions":[{"version":"55abc39","status":"affected"}],"modules":["GBNF Grammar Handler"]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":4.8,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":3.3,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","baseSeverity":"LOW"}},{"cvssV3_0":{"version":"3.0","baseScore":3.3,"vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","baseSeverity":"LOW"}},{"cvssV2_0":{"version":"2.0","baseScore":1.7,"vectorString":"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C"}}],"timeline":[{"time":"2026-02-06T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-02-06T01:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-02-10T05:46:24.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"TYGLS (VulDB User)","type":"reporter"}],"references":[{"url":"https://vuldb.com/?id.344636","name":"VDB-344636 | ggml-org llama.cpp GBNF Grammar llama-grammar.cpp llama_grammar_advance_stack stack-based overflow","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/?ctiid.344636","name":"VDB-344636 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/?submit.745263","name":"Submit #745263 | llama.cpp commit 55abc39 Stack-based Buffer Overflow","tags":["third-party-advisory"]},{"url":"https://github.com/ggml-org/llama.cpp/issues/18988","tags":["issue-tracking"]},{"url":"https://github.com/ggml-org/llama.cpp/issues/18988#event-4426704865","tags":["issue-tracking"]},{"url":"https://github.com/user-attachments/files/24761101/poc.zip","tags":["exploit"]},{"url":"https://github.com/ggml-org/llama.cpp/pull/18993","tags":["issue-tracking","patch"]},{"url":"https://github.com/ggml-org/llama.cpp/","tags":["product"]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-10T15:18:13.164026Z","id":"CVE-2026-2069","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-02-10T15:18:27.688Z"}}]}}