CVE-2026-119052: llama.cpp ggml-rpc server denial of service

CVE-2026-119052 · Severity: high · CVSS 7.5 · Published 2026-10-29

llama.cpp is an open-source C/C++ library for running large language models locally. The ggml-rpc server component, which handles distributed inference requests, crashes when an unauthenticated attacker sends messages with oversized length values, causing a complete service outage affecting all connected clients and halting inference operations.

Technologies: Ggml-Org Llama.Cpp. Vendors: Ggml-Org.

Quick answers

Is CVE-2026-119052 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-119052 being exploited in the wild.
How severe is CVE-2026-119052?
High severity, with a CVSS score of 7.5, published 29 October 2026.
Which products and versions are affected?
Ggml-Org Llama.Cpp b2877 before b11935.
Is there a fix for CVE-2026-119052?
Yes: fixed in b11935 onwards. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-119052 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-119052?
Check whether you run Ggml-Org Llama.Cpp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: b11935 onwards

Technical details

An uncaught std::length_error exception in the ggml-rpc server occurs when an attacker sends a command (such as SET_TENSOR) after the HELLO handshake with a message length exceeding std::vector::max_size(), causing the process to abort. The vulnerability requires network access to the RPC server but no authentication, and the attack vector is straightforward message injection that triggers an unhandled exception leading to denial of service.

Affected products

  • ggml-org llama.cpp b2877 before b11935

Timeline

  • 2026-10-29: disclosed

References

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