---
id: CVE-2025-31177
title: gnuplot is affected by a heap buffer overflow at function utf8_copy_one.
summary: gnuplot is affected by a heap buffer overflow at function utf8_copy_one.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-122
vendor: gnuplot
product: gnuplot
affected:
  - gnuplot = 6.1.0
published: '2025-05-07'
updated: '2026-06-26'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-31177'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-31177'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2355342'
    label: secalert@redhat.com
  - url: 'https://sourceforge.net/p/gnuplot/bugs/2756/'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00199
epssPercentile: 0.08579
ingestedAt: '2026-06-26T16:43:13.603Z'
---

## Overview

gnuplot is affected by a heap buffer overflow at function utf8_copy_one.

## Affected

- `gnuplot = 6.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.