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8.4
CVE-2026-78147: Llama.cpp RPC server can be tricked into remote code execution
CVE-2026-78147 · published 11 days ago
Summary
The Llama.cpp software’s RPC server component can be fooled into processing specially crafted data, allowing an attacker to run code on the server from a distance. This happens because the server does not properly check the data it receives. Update to a patched version or apply the vendor’s recommended fix to stop the issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:26.04:LTS | canonical | llama.cpp | All versions |
| – | ggml-org | llama.cpp | bec4772f6 |
| Debian:14 | debian | llama.cpp | All versions |
Original advisory text
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. Perfo...
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.
References
- https://github.com/ggml-org/llama.cpp/
- https://github.com/ggml-org/llama.cpp/issues/25289 Third Party Advisory
- https://vuldb.com/cve/CVE-2026-78147
- https://vuldb.com/submit/882534
- https://vuldb.com/vuln/394534
- https://vuldb.com/vuln/394534/cti
- https://security-tracker.debian.org/tracker/CVE-2026-78147 Vendor Advisory
- https://ubuntu.com/security/CVE-2026-78147 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-78147 Third Party Advisory
Severity
8.4
High
CVSS 2.0: 7.5 (NVD)
CVSS 3.1: 7.3 (NVD)
CVSS 4.0: 6.9 (NVD)
CVSS 3.1: 7.3 (OSV)
Exploitation
EPSS <1%
Type
CWE-20Improper Input Validation
CWE-502Deserialization of Untrusted Data
Timeline
Published23 Aug 2026
Updated3 Sep 2026
First seen23 Aug 2026
Sources
CVE-2026-78147 · NVD
CVE-2026-78147 · MITRE
DEBIAN-CVE-2026-78147 · OSV
UBUNTU-CVE-2026-78147 · OSV
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