CVE-2026-52131 Denial of service in n/a
A reachable assertion in the gguf_reader allows attackers to cause a denial of service in llama.cpp applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-52131?
CVE-2026-52131 is a high-severity denial of service vulnerability in n/a, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
llama.cpp b5693 and before has a Reachable Assertion via the gguf_reader::read function.
Weakness: CWE-617
Which versions are affected by CVE-2026-52131?
It affects 1 product.
Products include Ggml Llama.cpp.
How do I fix CVE-2026-52131?
No fix has been published for CVE-2026-52131 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-52131 being exploited?
There is no known exploitation of CVE-2026-52131 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2024-42479 llama.cpp allows write-what-where in rpc_server::set_tensor
- CVE-2026-34159 llama.cpp: Unauthenticated RCE via GRAPH_COMPUTE buffer=0 bypass in llama.cpp RPC backend
- CVE-2026-43629 llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore
- CVE-2026-43631 llama.cpp b7492–b9060 Use-After-Free RCE via llama-server
- CVE-2026-43632 llama.cpp b7492–b9060 Use-After-Free in Tokenization Endpoints
Sources
Also known as DEBIAN-CVE-2026-52131, GHSA-jfjx-j76r-xrpf, UBUNTU-CVE-2026-52131.