CVE-2026-2069

LOW EPSS 2.5%
Published Feb 6, 20264mo ago · Modified Jun 17, 20262w ago
1.9 CVSS 4.0
Low
Find Similar
Published Feb 6, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
1.9
Exploitability
—
Impact
—
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
2.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-121

References 8

  • github.com https://github.com/ggml-org/llama.cpp/
  • github.com https://github.com/ggml-org/llama.cpp/issues/18988
  • github.com https://github.com/ggml-org/llama.cpp/issues/18988#event-4426704865
  • github.com https://github.com/ggml-org/llama.cpp/pull/18993
  • github.com https://github.com/user-attachments/files/24761101/poc.zip
  • vuldb.com https://vuldb.com/?ctiid.344636
  • vuldb.com https://vuldb.com/?id.344636
  • vuldb.com https://vuldb.com/?submit.745263

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.