---
id: CVE-2026-79516
title: >-
  An out-of-bounds read in the stbsp_vsnprintf function (stb_sprintf.h) of
  nothings stb commit 31c1ad3 allows attackers to cause a Denial of Service
  (DoS) via sending a crafted input.
summary: >-
  An out-of-bounds read in the stbsp_vsnprintf function (stb_sprintf.h) of
  nothings stb commit 31c1ad3 allows attackers to cause a Denial of Service
  (DoS) via sending a crafted input.
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AC:H/AV:L/A:L/C:N/I:L/PR:N/S:U/UI:N'
cvssSource: cna
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T12:27:17.870567Z'
exploitAvailable: true
published: '2026-09-09'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T12:28:44.627Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-79516'
references:
  - url: 'https://github.com/nothings/stb/issues/1963'
tags:
  - cve.org
  - exploit-available
epss: 0.00094
epssPercentile: 0.00699
ingestedAt: '2026-09-14T15:23:07.432Z'
---

## Overview

An out-of-bounds read in the stbsp_vsnprintf function (stb_sprintf.h) of nothings stb commit 31c1ad3 allows attackers to cause a Denial of Service (DoS) via sending a crafted input.

## Remediation

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