CVE-2026-40934

Katalog CVE

CVSS 6.8 · Medium EPSS 0,38%

Kerentanan Insufficient Session Expiration pada jupyter server. Skor CVSS 3.1 6.8 (Medium) menurut NVD.

Deskripsi (NVD)

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at ~/.local/share/jupyter/runtime/jupyter_cookie_secret and is never rotated when a user changes their password. After a password reset and server restart, any previously issued authentication cookie remains cryptographically valid because the signing key has not changed. An attacker who has captured a session cookie through any means retains full authenticated access to the server regardless of subsequent password changes. This affects deployments using password-based authentication, particularly shared or public-facing servers where credential rotation is expected to revoke existing sessions. This issue has been fixed in version 2.18.0.

Rincian

Terbit di NVD

5 Mei 2026

Terakhir diubah

25 Juli 2026

Status NVD

Analyzed

CVSS 3.1

6.8 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-613: Insufficient Session Expiration

EPSS (30 hari)

0,38% peluang dieksploitasi; lebih tinggi dari 30,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-5mrq-x3x5-8v8f exploit · mitigasi · advisory vendor