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CVE-2026-27641 β€” AI Deep Analysis Summary

CVSS 9.8 Β· Critical

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: A critical flaw in `flask-reuploaded` (v<1.5.0) allowing **Path Traversal** and **Extension Bypass**. πŸ’₯ **Consequences**: Arbitrary file write & **Remote Code Execution (RCE)**.…

Q2Root Cause? (CWE/Flaw)

πŸ›‘οΈ **Root Cause**: **CWE-1336** (Improper Validation of Array Length/Bounds).…

Q3Who is affected? (Versions/Components)

πŸ‘₯ **Affected**: `flask-reuploaded` versions **prior to 1.5.0**. Developed by **jugmac00**. If you use this Flask extension for file uploads, you are at risk.

Q4What can hackers do? (Privileges/Data)

πŸ’€ **Attacker Capabilities**: Full system compromise. Can write arbitrary files to the server and execute code remotely. **No authentication** required (PR:N). Total loss of Confidentiality, Integrity, and Availability.

Q5Is exploitation threshold high? (Auth/Config)

πŸ”“ **Exploitation Threshold**: **LOW**. Attack Vector: Network (AV:N). Complexity: Low (AC:L). No Privileges (PR:N) or User Interaction (UI:N) needed. It is an **easy target** for automated scanners.

Q6Is there a public Exp? (PoC/Wild Exploitation)

πŸ“‚ **Public Exploit**: **No PoC provided** in this dataset. However, given the CVSS 9.8 and nature of the bug, wild exploitation is highly likely once details are public. Check GitHub advisories for community POCs.

Q7How to self-check? (Features/Scanning)

πŸ” **Self-Check**: Scan your `requirements.txt` or `pip list`. Look for `flask-reuploaded` version **< 1.5.0**. If present, you are vulnerable. Check if you handle file uploads via this specific library.

Q8Is it fixed officially? (Patch/Mitigation)

βœ… **Official Fix**: **YES**. Patched in version **1.5.0**. See GitHub Commit `d64c6b2` and Advisory `GHSA-65mp-fq8v-56jr`. Upgrade immediately to resolve the path traversal and extension bypass issues.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: **Not Recommended**. Since this is a core library flaw, temporary mitigations are difficult.…

Q10Is it urgent? (Priority Suggestion)

πŸ”₯ **Urgency**: **CRITICAL (P1)**. CVSS 9.8 + No Auth Required = Immediate Action. Patch to v1.5.0+ **NOW**. Do not wait. This is a direct path to server takeover.