CVE-2026-4538 — AI Deep Analysis Summary

🚨 **Root Cause**: **Deserialization Vulnerability**!…

🔍 **CWE Classification**: **CWE-502** (Deserialization of Untrusted Data) ❌ **Vulnerability**: • The pt2 loader handler **lacks input validation** • Directly invokes deserialization without filtering dangerous classes •…

🎯 **Affected Versions**: **PyTorch 2.10.0** 📦 **Impacted Components**: • **pt2 Loading Handler** (pt2 loader handler) • Specifically, an internal unknown functionality module

👾 **Attacker Capability** (CVSS 3.1 Score): • **Confidentiality**: Low (C:L) → Read sensitive data • **Integrity**: Low (I:L) → Tamper with configurations/files • **Availability**: Low (A:L) → Service disruption ⚠️ **Pr…

📊 **Exploitation Difficulty**: **Low** ✅ Attack Vector: Local (AV:L) ✅ Attack Complexity: Low (AC:L) ✅ No user interaction required (UI:N) ✅ No additional privilege escalation needed 🚫 **Limitation**: Limited to local …

💣 **PoC Status**: **Publicly Available!** • GitHub PR #176791 contains **exploit code** • Labeled with `exploit` tag • No reports of in-the-wild exploitation (pocs empty) • ⚠️ Risk of malicious use exists

🔎 **Self-Check Method**: 1. **Version Check** • Run `python -c "import torch; print(torch.__version__)"` • Verify if version is **2.10.0** 2.…

⏳ **Patch Status**: **Not Fixed!** • Project maintainers have been **aware** via PR (##176791) • ❌ **No response or merge yet** • Patch link exists but not officially released • No official security advisory issued

🛡️ **Workaround Measures**: • 🚫 **Disable loading of pt2 format** for untrusted models • 🔒 Strictly limit local user permissions (principle of least privilege) • 📁 Isolate model files and run PyTorch in a sandbox • ✍️ I…

🔥 **Priority**: **Medium to High** | Dimension | Assessment | |-----------|------------| | CVSS Score | ~5.3 (Medium Severity) | | Exploit Code | ✅ Publicly Available | | Attack Scope | ❌ Local-only | | Patch Status | ❌…