CVE-2026-31938 — AI Deep Analysis Summary

🚨 **Essence**: A Cross-Site Scripting (XSS) flaw in **jsPDF**. 📄 **Consequences**: Attackers can inject arbitrary **HTML** into the browser environment via the `output` function's `options` parameter.…

🛡️ **Root Cause**: Insufficient control/validation of the `options` parameter in the `output` function. 📉 **CWE**: **CWE-79** (Improper Neutralization of Input During Web Page Generation).…

👥 **Affected**: **jsPDF** by **Parallax**. 📦 **Version**: All versions **prior to 4.2.1**. 🚫 If you are using v4.2.0 or lower, you are vulnerable. ✅ Upgrade to v4.2.1+ to be safe.

💻 **Attacker Actions**: Inject malicious scripts/HTML. 🍪 **Impact**: Steal cookies, hijack sessions, or perform actions on behalf of the user. 📈 **CVSS**: High impact on Confidentiality (C:H) and Integrity (I:H).…

🔓 **Threshold**: **Low**. 🌐 **Access**: Network (AV:N), Low Complexity (AC:L). 🚫 **Auth**: None required (PR:N). 🤝 **UI**: Requires User Interaction (UI:R).…

📜 **Public Exp?**: No specific PoC code provided in the data. 🔍 **Status**: Confirmed via GitHub Advisory (GHSA-wfv2-pwc8-crg5).…

🔍 **Self-Check**: Scan for **jsPDF** library usage in frontend code. 📊 **Version Audit**: Check `package.json` or dependency tree for versions < **4.2.1**.…

🛠️ **Fixed?**: **YES**. ✅ **Patch**: Version **4.2.1** resolves this issue. 🔗 **Reference**: See GitHub release notes and commit `87a40bbd07e6b30575196370670b41f264aa78d7`. 📥 Update immediately.

🚧 **No Patch?**: Implement strict **Input Validation** on the `options` parameter. 🚫 **Sanitize**: Ensure no raw HTML/JS is passed to the `output` function.…

🔥 **Urgency**: **HIGH**. 📅 **Published**: 2026-03-18. 🚨 **Priority**: Critical for any web app generating PDFs client-side. 🏃 **Action**: Patch to v4.2.1 ASAP to prevent XSS attacks. Don't wait!