id: PYSEC-2025-259
published: "2025-08-27T19:15:37.560Z"
modified: "2026-07-13T05:50:39.141007Z"
aliases:
- CVE-2025-58050
- GHSA-c2gv-xgf5-5cc2
details: The PCRE2 library is a set of C functions that implement regular expression pattern matching. In version 10.45, a heap-buffer-overflow read vulnerability exists in the PCRE2 regular expression matching engine, specifically within the handling of the (*scs:...) (Scan SubString) verb when combined with (*ACCEPT) in src/pcre2_match.c. This vulnerability may potentially lead to information disclosure if the out-of-bounds data read during the memcmp affects the final match result in a way observable by the attacker. This issue has been resolved in version 10.46.
affected:
- package:
    name: pcre2
    ecosystem: PyPI
    purl: pkg:pypi/pcre2
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - last_affected: "10.45"
  versions:
  - 0.1.0
  - 0.2.0
  - 0.3.0
  - 0.4.0
  - 0.5.0
  - 0.5.1
  - 0.5.2
  - 0.5.3
  - 0.6.0
  - 0.7.0
  ecosystem_specific: {}
references:
- type: ADVISORY
  url: https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.46
- type: FIX
  url: https://github.com/PCRE2Project/pcre2/commit/a141712e5967d448c7ce13090ab530c8e3d82254
- type: EVIDENCE
  url: https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-c2gv-xgf5-5cc2
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H