highCVSS 7.8NVD status: Analyzed

CVE-2026-27940

llama.cpp is an inference of several LLM models in C/C++.

Componentllama.cpp
Severityhigh (CVSS 7.8)
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published (NVD)2026-03-12
Last modified2026-06-17
Affected versions
llama.cpp < b8146
Fixed inb8146
WeaknessCWE-122CWE-190
CISA KEVnot listed

NVD description

llama.cpp is an inference of several LLM models in C/C++. Prior to b8146, the gguf_init_from_file_impl() in gguf.cpp is vulnerable to an Integer overflow, leading to an undersized heap allocation. Using the subsequent fread() writes 528+ bytes of attacker-controlled data past the buffer boundary. This is a bypass of a similar bug in the same file - CVE-2025-53630, but the fix overlooked some areas. This vulnerability is fixed in b8146.

Does CVE-2026-27940 hit the version you run?Paste your docker-compose.yml, requirements.txt or package.json. The scanner checks your pinned versions against this CVE and every other one we track for llama.cpp.
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What to do

  • Upgrade llama.cpp to b8146 or later.
  • Do not expose the component's API or UI to the internet without authentication in front of it.

Sources

Other llama.cpp CVEs

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