---
id: CVE-2026-88370
title: >-
  libconfini 1.16.4 contains a heap out-of-bounds write condition involving the
  bundled load_ini_buffer.h utility and strip_ini_cache()
summary: >-
  libconfini 1.16.4 contains a heap out-of-bounds write condition involving the
  bundled load_ini_buffer.h utility and strip_ini_cache(). The bundled utility
  allocates exactly ini_length bytes, while strip_ini_cache() unconditionally
  writes…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-122
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T16:17:29.020'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88370'
references:
  - url: 'https://github.com/madmurphy/libconfini/issues/20'
    label: cve@mitre.org
  - url: 'https://github.com/madmurphy/libconfini/issues/20'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00293
epssPercentile: 0.19594
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-25T15:31:19.915848Z'
ingestedAt: '2026-09-24T16:47:15.826Z'
---

## Overview

libconfini 1.16.4 contains a heap out-of-bounds write condition involving the bundled load_ini_buffer.h utility and strip_ini_cache(). The bundled utility allocates exactly ini_length bytes, while strip_ini_cache() unconditionally writes a NUL terminator at ini_source[ini_length], requiring an additional writable byte. Applications using the bundled allocation pattern can trigger deterministic heap memory corruption when processing any non-empty INI input, resulting in denial of service.

## Remediation

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