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
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pywasm3 | <= 0.5.0 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-6272
- https://github.com/wasm3/wasm3/issues/531
- https://github.com/pypa/advisory-database/tree/main/vulns/pywasm3/PYSEC-2025-186.yaml
- https://github.com/user-attachments/files/19516600/wasm3_crash.txt
- https://github.com/wasm3/pywasm3
- https://github.com/wasm3/pywasm3/blob/main/wasm3/m3_compile.c#L333
- https://vuldb.com/?ctiid.313276
- https://vuldb.com/?id.313276
- https://vuldb.com/?submit.593008
- https://github.com/advisories/GHSA-rrmw-gv85-w824
- CVSS vector
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- Weakness (CWE)
CWE-119- Platform
- Python (PyPI)
- Package
pywasm3- Disclosed
- 19.06.2025
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-rrmw-gv85-w824 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2025-186 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: pywasm3
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 11
- First → latest
- 05.2022 06.2025
- Without a fix
- 11
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 7
- Medium 2
- Low 1
Disclosures per year
- 2022: 3
- 2023: 0
- 2024: 7
- 2025: 1
- 2026: 0
-
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 this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.