id: PYSEC-2026-1270
published: "2026-07-07T11:45:17.786428Z"
modified: "2026-07-07T17:23:57.163337Z"
aliases:
- CVE-2023-26112
- GHSA-c33w-24p9-8m24
summary: configobj ReDoS exploitable by developer using values in a server-side configuration file
details: "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:
- package:
    name: configobj
    ecosystem: PyPI
    purl: pkg:pypi/configobj
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 5.0.9
  versions:
  - 4.4.0
  - 4.5.0
  - 4.5.1
  - 4.5.2
  - 4.5.3
  - 4.6.0
  - 4.7.0
  - 4.7.1
  - 4.7.2
  - 5.0.0
  - 5.0.1
  - 5.0.2
  - 5.0.3
  - 5.0.4
  - 5.0.5
  - 5.0.6
  - 5.0.7
  - 5.0.8
references:
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2023-26112
- type: WEB
  url: https://github.com/DiffSK/configobj/issues/232
- type: WEB
  url: https://github.com/DiffSK/configobj/commit/7c618b0bbaff6ecaca51a6f05b29795d1377a4a5
- type: PACKAGE
  url: https://github.com/DiffSK/configobj
- type: WEB
  url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6BO4RLMYEJODCNUE3DJIIUUFVTPAG6VN
- type: WEB
  url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NZHY7B33EFY4LESP2NI4APQUPRROTAZK
- type: WEB
  url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYU4IHVLOTYMFPH7KDOJGKZQR4GKWPFK
- type: WEB
  url: https://pypi.org/project/configobj/5.0.9
- type: WEB
  url: https://security.snyk.io/vuln/SNYK-PYTHON-CONFIGOBJ-3252494
- type: PACKAGE
  url: https://pypi.org/project/configobj
- type: ADVISORY
  url: https://github.com/advisories/GHSA-c33w-24p9-8m24
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L