---
id: CVE-2023-26112
aliases:
  - GHSA-c33w-24p9-8m24
  - PYSEC-2026-1270
title: >-
  configobj ReDoS exploitable by developer using values in a server-side
  configuration file
summary: >-
  configobj ReDoS exploitable by developer using values in a server-side
  configuration file
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
vendor: configobj
product: configobj
ecosystem: pip
affected:
  - configobj < 5.0.9
patched:
  - configobj 5.0.9
published: '2023-04-03'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:53.765738860Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-c33w-24p9-8m24'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-26112'
  - url: 'https://github.com/DiffSK/configobj/issues/232'
  - url: >-
      https://github.com/DiffSK/configobj/commit/7c618b0bbaff6ecaca51a6f05b29795d1377a4a5
  - url: 'https://github.com/DiffSK/configobj'
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6BO4RLMYEJODCNUE3DJIIUUFVTPAG6VN
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NZHY7B33EFY4LESP2NI4APQUPRROTAZK
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYU4IHVLOTYMFPH7KDOJGKZQR4GKWPFK
  - url: 'https://pypi.org/project/configobj/5.0.9'
  - url: 'https://security.snyk.io/vuln/SNYK-PYTHON-CONFIGOBJ-3252494'
tags:
  - osv
  - pip
epss: 0.01269
epssPercentile: 0.68558
ingestedAt: '2026-07-08T18:25:48.129Z'
---

## Overview

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)\((.*)\). **Note:** This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

## Affected packages

- `configobj < 5.0.9`

## Remediation

Upgrade to a patched release:

- `configobj 5.0.9`