Vulnerability DatabaseCVE-2026-107183
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CVE-2026-107183
Published:October 07, 2026
Updated:October 10, 2026
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.
Affected Packages
https://github.com/ggml-org/llama.cpp.git (GITHUB):
Affected version(s) >=b8227 <b11393
Fix Suggestion:
Update to version b11393
Related Resources (8)
https://github.com/ggml-org/llama.cpp/commit/dbe4c3ed42343f0a7ba0fd7e808ffeaca404d29f
https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/common/chat-peg-parser.cpp#L343-L355
https://github.com/ggml-org/llama.cpp/pull/29942
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107183.json
https://github.com/ggml-org/llama.cpp
https://nvd.nist.gov/vuln/detail/CVE-2026-107183
https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/tools/server/server-schema.cpp#L321-L324
https://www.vulncheck.com/advisories/llama-cpp-before-b11393-use-after-free-via-common-chat-peg-mapper-chat-parser
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CVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Use After Free
CWE-416
EPSS
Base Score:
0.42