CVE-20XX-?
agent?

CVE-2026-39377

6.5 MEDIUM 0.3% exploit odds Fix listed Disclosure

What it is

The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. Versions 6.5 through 7.17.0 allow arbitrary file writes to locations outside the intended output directory when processing notebooks containing crafted cell attachment filenames. The `ExtractAttachmentsPreprocessor` passes attachment filenames directly to the filesystem without sanitization, enabling path traversal attacks. This vulnerability provides complete control over both the destination path and file extension. Version 7.17.1 contains a patch.

At a glance

Exploitability
Can be exploited over the network without logging in, but needs a user to act. High risk of data tampering.
Exploit odds
0.3% chance of exploitation in the next 30 days (EPSS).
Fix
A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Exploit probability
0.3% · EPSS, next 30 days
Weakness
CWE-22 · Path traversal
Record status
Analyzed

Affected

Attack profile CVSS 3.1 · 6.5

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-39377.md and follow it. Check whether this project is affected by CVE-2026-39377. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

· More options · Status badge

Meme: I wake up, CVE-2026-39377
Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record