CVE-2026-78147Network attack vector

Unauthenticated code execution via deserialized function pointer

Published Aug 23, 2026 · Updated Aug 23, 2026

Deserialization in the ggml-RPC Server in ggml.ai llama.cpp bec4772f6 allows remote attackers to execute code via crafted tensor fields. deserialize_tensor copies network-controlled op and op_params values without validation; custom-operation execution then treats op_params as a function pointer and argument. The RPC backend must be enabled and reachable, but it provides no authentication, and successful exploitation transfers control to an attacker-selected address.

CVSS severity7.3
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in the ggml-RPC Server in ggml.ai llama.cpp bec4772f6 allows remote attackers to execute code via crafted tensor fields. deserialize_tensor copies network-controlled op and op_params values without validation; custom-operation execution then treats op_params as a function pointer and argument. The RPC backend must be enabled and reachable, but it provides no authentication, and successful exploitation transfers control to an attacker-selected address.

The record

CVE
CVE-2026-78147
Published
Aug 23, 2026
Updated
Aug 23, 2026
Vendor
Georgi Gerganov
Product
llama.cpp
Classifications
CWE-502, CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=bec4772f6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Georgi Gerganov · llama.cppversion=bec4772f6

Published CVSS scores

7.5VulDB CNAAV:N/AC:L/Au:N/C:P/I:P/A:P
6.9VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
7.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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