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CVE-2025-6272
Buffer Overflow in pywasm3 (CVE-2025-6272)
Summary
vulnerability in pywasm3 (CVE-2025-6272). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-6272** has been found in pywasm3.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "pywasm3 CVE-2025-6272" on the vendor's site.
CVE-2025-6272 (pywasm3) — CWE-119 /
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-119) exists in pywasm3.
📍 Affected scope
pywasm3 — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'pywasm3' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'pywasm3' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `pywasm3` を grep し、稼働しているサービス・バージョンを把握する。
-
7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
PyPI
pywasm3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.5.0"}]}]
pip
pywasm3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory https://vuldb.com/?id.313276
- advisory https://vuldb.com/?submit.593008
- advisory https://nvd.nist.gov/vuln/detail/CVE-2025-6272
- advisory https://github.com/advisories/GHSA-rrmw-gv85-w824
- package https://github.com/wasm3/pywasm3
- report https://github.com/wasm3/wasm3/issues/531
- report https://vuldb.com/?ctiid.313276
- report https://github.com/user-attachments/files/19516600/wasm3_crash.txt
- web https://github.com/pypa/advisory-database/tree/main/vulns/pywasm3/PYSEC-2025-186.yaml
- web https://github.com/wasm3/pywasm3/blob/main/wasm3/m3_compile.c#L333