ggml-org llama.cpp bec4772f6 ggml-RPC Server ggml-rpc.cpp deserialize_tensor op/op_params deserialization

Summaryinfo

A vulnerability classified as critical was found in ggml-org llama.cpp bec4772f6. This affects the function deserialize_tensor of the file ggml/src/ggml-rpc/ggml-rpc.cpp of the component ggml-RPC Server. Executing a manipulation of the argument op/op_params can lead to deserialization. The identification of this vulnerability is CVE-2026-78147. The attack may be launched remotely. There is no exploit available. This vulnerability is distinct from CVE-2026-34159 (GHSA-j8rj-fmpv-wcxw, PR #20908), which only added a buffer==nullptr rejection in create_node() and does not validate op or op_params. The reported GitHub issue was closed automatically due to inactivity.

Detailsinfo

A vulnerability classified as critical was found in ggml-org llama.cpp bec4772f6. This vulnerability affects the function deserialize_tensor of the file ggml/src/ggml-rpc/ggml-rpc.cpp of the component ggml-RPC Server. The manipulation of the argument op/op_params with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability was named CVE-2026-78147. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/23/2026).

The reported GitHub issue was closed automatically due to inactivity. This vulnerability is distinct from CVE-2026-34159 (GHSA-j8rj-fmpv-wcxw, PR #20908), which only added a buffer==nullptr rejection in create_node() and does not validate op or op_params.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• ggml-org

Name

• llama.cpp

Version

• bec4772f6

Website

• Product: https://github.com/ggml-org/llama.cpp/

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Accepted

• Submit #882534: ggml-org llama.cpp master bec4772f6 Memory Corruption (by m00dy)

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