CVE-2026-107183 PUBLISHED

llama.cpp before b11393 contains a use-after-free and double free vulnerability in common_chat_peg_mapper::map that allows unauthenticated remote attackers to corrupt heap memory via a dangling current_tool pointer. Attackers can submit a chat_parser in a POST /completion request emitting a tool-id after a tool-close tag to crash llama-server and shape a heap write primitive.

• Anas finder

• https://github.com/ggml-org/llama.cpp/pull/29942
• Patch Commit
• Dangling current_tool in common_chat_peg_mapper::map
• chat_parser accepted from request body
• https://github.com/ggml-org/llama.cpp
• VulnCheck Advisory: llama.cpp before b11393 Use-After-Free via common_chat_peg_mapper chat_parser

• Use After Free CWE