What’s Vulnerable › Vulnerabilities

CVE-2024-58400: llama.cpp before b3701 Out-of-Bounds Read in llama_decode via Token IDs

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-27 · updated 2026-10-27
• Weakness: CWE-129

Description

llama.cpp before b3701 contains an out-of-bounds read vulnerability in llama_decode_internal and llama_encode_internal that allows remote unauthenticated attackers to read memory by supplying unvalidated token IDs. Attackers can send integer-array prompts to the llama-server /completion endpoint with IDs outside 0 to n_vocab to read embedding memory out of bounds or crash the process.

Affected products

• ggml-org llama.cpp: before b3701 — fixed in b3701

How to fix

Upgrade to a fixed version: ggml-org llama.cpp b3701. Check the vendor advisory for mitigations.

References

• https://github.com/ggml-org/llama.cpp/blob/b3681/examples/server/server.cpp#L789
• https://github.com/ggml-org/llama.cpp/commit/eae597182cb61bbde0b26e7cec5999d28b9327fe
• https://github.com/ggml-org/llama.cpp/commit/faf69d4237c9ae4d7f572b4674d1002463e8acd3
• https://github.com/ggml-org/llama.cpp/pull/9359
• https://github.com/ggml-org/llama.cpp/releases/tag/b3701
• https://www.vulncheck.com/advisories/llama-cpp-before-b3701-out-of-bounds-read-in-llama-decode-via-token-ids

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