affected:
- ecosystem_specific: {}
  package:
    ecosystem: PyPI
    name: pywasm3
    purl: pkg:pypi/pywasm3
  ranges:
  - events:
    - introduced: '0'
    - last_affected: 0.5.0
    type: ECOSYSTEM
  versions:
  - 0.0.1
  - 0.0.2
  - 0.4.8
  - 0.4.9
  - 0.5.0
aliases:
- CVE-2025-6272
- GHSA-rrmw-gv85-w824
details: A vulnerability has been found in wasm3 0.5.0 and classified as problematic.
  This vulnerability affects the function MarkSlotAllocated of the file source/m3_compile.c.
  The manipulation leads to out-of-bounds write. An attack has to be approached locally.
  The exploit has been disclosed to the public and may be used.
id: PYSEC-2025-186
modified: '2026-05-21T14:54:42.578466Z'
published: '2025-06-19T18:15:22Z'
references:
- type: ADVISORY
  url: https://vuldb.com/?id.313276
- type: ADVISORY
  url: https://vuldb.com/?submit.593008
- type: REPORT
  url: https://github.com/wasm3/wasm3/issues/531
- type: REPORT
  url: https://vuldb.com/?ctiid.313276
- type: EVIDENCE
  url: https://github.com/user-attachments/files/19516600/wasm3_crash.txt
- type: ADVISORY
  url: https://github.com/advisories/GHSA-rrmw-gv85-w824
severity:
- score: 
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  type: CVSS_V4