Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck

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

High 8.2

In plain English

A high-severity security flaw in llama.cpp from ggml-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.4%top 63.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:26.04:LTS	llama.cpp	no fix listed	UBUNTU-CVE-2024-58400
Ubuntu:26.10	llama.cpp	no fix listed	UBUNTU-CVE-2024-58400

Affected products (as reported)

Vendor	Product	Versions
ggml-org	llama.cpp	0 – before b3701

Weakness: CWE-129 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

References

https://github.com/ggml-org/llama.cpp/pull/9359 patch, issue-tracking
https://github.com/ggml-org/llama.cpp/commit/faf69d4237c9ae4d7f572b4674d1002463e8acd3 patch
https://github.com/ggml-org/llama.cpp/commit/eae597182cb61bbde0b26e7cec5999d28b9327fe patch
https://github.com/ggml-org/llama.cpp/blob/b3681/examples/server/server.cpp#L789 technical-description
llama.cpp b3701 Release Notes release-notes
VulnCheck Advisory: llama.cpp before b3701 Out-of-Bounds Read in llama_decode via Token IDs third-party-advisory