What is CVE-2026-52131?

CVE-2026-52131 is a high-severity vulnerability in Ggml Llama.cpp, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-09-01.

How severe is CVE-2026-52131?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Ggml Llama.cpp

CVE-2026-52131

llama.cpp b5693 and before has a Reachable Assertion via the gguf_reader::read function.

Published 2026-09-01 · last modified 2026-09-04.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.0th percentile), scored 2026-10-17.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002

Affected products

Ggml Llama.cpp

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

github.com/ggml-org/llama.cpp (Product)
blog.ph4nt0m.xyz/ko/cves/cve-2026-52130/ (Not Applicable)

Frequently asked questions

What is CVE-2026-52131?: CVE-2026-52131 is a high-severity vulnerability in Ggml Llama.cpp, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-09-01.
How severe is CVE-2026-52131?: High severity. CVSS v3 base score is 7.5 out of 10.