Vulnerabilities in pkg:pypi/pywasm3
PACKAGECVE-2025-6272 is a LOW (CVSS 3.3) pywasm3 has improper restriction of vulnerability (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) affecting Pywasm3 libraries in the PyPI ecosystem. The issue involves pywasm3 has improper restriction of operations within the bounds of a memory buffer. Remediation is available in the latest vendor maintenance releases.
pkg:pypi/pywasm3
Vulnerability advisories affecting package pkg:pypi/pywasm3. Select an advisory below to view technical details or fixes.
| Advisory ID | CVE / NVD | Severity | Summary |
|---|---|---|---|
| GHSA-rrmw-gv85-w824 | CVE-2025-6272 | LOW | pywasm3 has Improper Restriction of Operations within the Bounds of a Memory Buffer |
| GHSA-46r6-92jg-22jg | CVE-2024-27530 | HIGH | pywasm3 contains a Use-After-Free in ForEachModule |
| GHSA-mhg9-mm8c-c683 | CVE-2024-27528 | HIGH | pywasm3 has an Invalid Memory Read, Leading to DoS and Potential Code Execution |
| GHSA-hh39-vjv8-j337 | CVE-2024-34252 | CRITICAL | pywasm3 contains a global buffer overflow which leads to segmentation fault |
| GHSA-mq9p-qw76-q6h7 | CVE-2024-34249 | CRITICAL | pywasm3 contains a heap buffer overflow which leads to segmentation fault |
| GHSA-fmq6-4w57-2w3v | CVE-2024-27529 | MODERATE | wasm3 uncontrolled memory allocation vulnerability |
| GHSA-77fq-4xf5-hph4 | CVE-2022-28990 | HIGH | Buffer overflow in wasm3 |
| GHSA-crf8-h2wq-2h9x | CVE-2022-39974 | HIGH | WASM3 Improper Input Validation vulnerability |
| GHSA-gq4p-4hxv-5rg9 | CVE-2022-34529 | MODERATE | WASM3 segmentation fault |
CVE-2025-6272 at a Glance
Security Impact
CVSS: 3.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
How to Fix CVE-2025-6272
To remediate this vulnerability, upgrade all affected Pywasm3 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install pywasm3>=Latest secure releaseRun the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show pywasm3How to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2025-6272, inspect your installed packages using pip:
pip show pywasm3Analyze the terminal output to locate any version of Pywasm3 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: The pip show pywasm3 command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, where the product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. this may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. In Pywasm3, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-6272 Affected Pywasm3 Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
pywasm3
|
PyPI |
≤ 0.5.0
|
|
References
Frequently Asked Questions
What is CVE-2025-6272?
Which Pywasm3 versions are affected?
What version fixes CVE-2025-6272?
Is pywasm3 affected?
What is the CVSS score of CVE-2025-6272?
What CWE is associated with CVE-2025-6272?
How can I check PyPI dependencies for CVE-2025-6272?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-rrmw-gv85-w824",
"modified" : "2026-06-09T19:09:31Z",
"published" : "2025-06-19T18:31:47Z",
"aliases" : [ "CVE-2025-6272" ],
"summary" : "pywasm3 has Improper Restriction of Operations within the Bounds of a Memory Buffer",
"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.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}, {
"type" : "CVSS_V4",
"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"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "pywasm3"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"last_affected" : "0.5.0"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-6272"
}, {
"type" : "WEB",
"url" : "https://github.com/wasm3/wasm3/issues/531"
}, {
"type" : "WEB",
"url" : "https://github.com/pypa/advisory-database/tree/main/vulns/pywasm3/PYSEC-2025-186.yaml"
}, {
"type" : "WEB",
"url" : "https://github.com/user-attachments/files/19516600/wasm3_crash.txt"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/wasm3/pywasm3"
}, {
"type" : "WEB",
"url" : "https://github.com/wasm3/pywasm3/blob/main/wasm3/m3_compile.c#L333"
}, {
"type" : "WEB",
"url" : "https://vuldb.com/?ctiid.313276"
}, {
"type" : "WEB",
"url" : "https://vuldb.com/?id.313276"
}, {
"type" : "WEB",
"url" : "https://vuldb.com/?submit.593008"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-119" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-09T19:09:31Z",
"nvd_published_at" : "2025-06-19T18:15:22Z"
}
}