Vulnerability · Published Oct 29, 2026 · Assigned by VulnCheck

CVE-2026-119052llama.cpp b2877 before b11935 ggml-rpc Server DoS via Oversized recv_msg Length

High 7.5

In plain English

A high-severity security flaw 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 50% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 50.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

llama.cpp b2877 before b11935 contains an uncaught exception vulnerability in the ggml-rpc server that allows unauthenticated remote attackers to crash the rpc-server by sending oversized message lengths. After the HELLO handshake, attackers can send a command such as SET_TENSOR with a length above std::vector::max_size(), triggering an uncaught std::length_error that aborts the process and denies service to all clients.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	llama.cpp	no fix listed	DEBIAN-CVE-2026-119052
Ubuntu:26.04:LTS	llama.cpp	no fix listed	UBUNTU-CVE-2026-119052
Ubuntu:26.10	llama.cpp	no fix listed	UBUNTU-CVE-2026-119052

Affected products (as reported)

Vendor	Product	Versions
ggml-org	llama.cpp	b2877 – before b11935

Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/ggml-org/llama.cpp/pull/31204 patch, issue-tracking
Patch Commit patch
https://github.com/ggml-org/llama.cpp product
llama.cpp b11935 Release Notes release-notes
https://github.com/ggml-org/llama.cpp/blob/8542e94350f0ade01644db6f1d1520da3814dafd/ggml/src/ggml-rpc/ggml-rpc.cpp#L344-L356 technical-description
VulnCheck Advisory: llama.cpp b2877 before b11935 ggml-rpc Server DoS via Oversized recv_msg Length third-party-advisory