Vulnerability · Published Aug 23, 2026 · Assigned by VulDB
CVE-2026-78147ggml-org llama.cpp ggml-RPC Server ggml-rpc.cpp deserialize_tensor deserialization
High 7.3
In plain English
A high-severity unsafe deserialization 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 0.6% (higher than 47% of all known vulnerabilities).
Official description
A vulnerability was found in ggml-org llama.cpp bec4772f6. The impacted element is the function deserialize_tensor of the file ggml/src/ggml-rpc/ggml-rpc.cpp of the component ggml-RPC Server. Performing a manipulation of the argument op/op_params results in deserialization. The attack may be initiated remotely. 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | llama.cpp | no fix listed | DEBIAN-CVE-2026-78147 |
| Ubuntu:26.04:LTS | llama.cpp | no fix listed | UBUNTU-CVE-2026-78147 |
| Ubuntu:26.10 | llama.cpp | no fix listed | UBUNTU-CVE-2026-78147 |
Affected products (as reported)
Weakness: CWE-502, CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
References
- VDB-394534 | ggml-org llama.cpp ggml-RPC Server ggml-rpc.cpp deserialize_tensor deserialization vdb-entry, technical-description
- VDB-394534 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-78147 | CVE Analysis and Report third-party-advisory
- Submit #882534 | ggml-org llama.cpp master bec4772f6 Memory Corruption third-party-advisory
- https://github.com/ggml-org/llama.cpp/issues/25289 issue-tracking
- https://github.com/ggml-org/llama.cpp/ product