What is CVE-2026-52132?

CVE-2026-52132 is a high-severity vulnerability in Ggml Llama.cpp, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-01.

How severe is CVE-2026-52132?

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

Vulnerability in Ggml Llama.cpp

CVE-2026-52132

llama.cpp through commit 97f06e9, when started with the --reranking flag, allows remote attackers to cause a denial of service (std::bad_alloc and HTTP 500) via a negative top_n value in a POST request to /rerank.

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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.0th percentile), scored 2026-10-17.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.0% 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: 0.006 · change: +0.003

Affected products

Ggml Llama.cpp

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

github.com/ggml-org/llama.cpp (Product)
blog.ph4nt0m.xyz/ko/cves/cve-2026-52132/ (Third Party Advisory)

Frequently asked questions

What is CVE-2026-52132?: CVE-2026-52132 is a high-severity vulnerability in Ggml Llama.cpp, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-01.
How severe is CVE-2026-52132?: High severity. CVSS v3 base score is 7.5 out of 10.