CVE-2026-6657

A flaw was found in jupyter-server. A remote attacker can bypass Cross-Origin Resource Sharing CORS origin validation when the alloworiginpat configuration is used. This vulnerability allows malicious domains to pass validation against patterns intended for trusted domains. This could lead to...

SUSE CVE-2026-6657

A vulnerability in jupyter-server versions 1.12.0 through 2.17.0 allows an attacker to bypass CORS origin validation when the alloworiginpat configuration is used. The issue arises from the use of re.match for validating the Origin header, which only anchors at the start of the string. This allow...

CVE-2026-6657

A vulnerability in jupyter-server versions 1.12.0 through 2.17.0 allows an attacker to bypass CORS origin validation when the alloworiginpat configuration is used. The issue arises from the use of re.match for validating the Origin header, which only anchors at the start of the string. This allow...

CVE-2026-6657

CVE-2026-6657 affects jupyter-server versions 1.12.0–2.17.0. Root cause: use of re.match() for Origin validation in allow_origin_pat, allowing attacker-controlled domains to bypass CORS checks (e.g., trusted.example.com.evil.com) across CORS headers, WebSocket, referer validation, and login redir...

CVE-2026-6657 CORS Origin Validation Bypass in jupyter-server

A vulnerability in jupyter-server versions 1.12.0 through 2.17.0 allows an attacker to bypass CORS origin validation when the alloworiginpat configuration is used. The issue arises from the use of re.match for validating the Origin header, which only anchors at the start of the string. This allow...

CVE-2026-6657 CORS Origin Validation Bypass in jupyter-server

A vulnerability in jupyter-server versions 1.12.0 through 2.17.0 allows an attacker to bypass CORS origin validation when the alloworiginpat configuration is used. The issue arises from the use of re.match for validating the Origin header, which only anchors at the start of the string. This allow...

Linux Distros Unpatched Vulnerability : CVE-2026-6657

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A vulnerability in jupyter-server versions 1.12.0 through 2.17.0 allows an attacker to bypass CORS origin validation when the alloworiginpat configuration is...

CVE-2026-40110

A flaw was found in Jupyter Server. The Origin header validation, which uses Python's re.match function, does not correctly validate incoming origins against allowed patterns. This allows a remote attacker to bypass Cross-Origin Resource Sharing CORS restrictions by crafting a malicious domain th...

CVE-2026-40110

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match to check incoming origins against the alloworiginpat configuration value. Because re.match only anchors at the start of the string and does not require a...

CVE-2026-40110 jupyter-server CORS origin validation bypass via unanchored regex in allow_origin_pat

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match to check incoming origins against the alloworiginpat configuration value. Because re.match only anchors at the start of the string and does not require a...

CVE-2026-40110 jupyter-server CORS origin validation bypass via unanchored regex in allow_origin_pat

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match to check incoming origins against the alloworiginpat configuration value. Because re.match only anchors at the start of the string and does not require a...

CVE-2026-40110

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match to check incoming origins against the alloworiginpat configuration value. Because re.match only anchors at the start of the string and does not require a...

Jupyter Server has a CORS Origin Validation Bypass via `re.match()` in `allow_origin_pat` (from huntr)

Jupyter Server uses re.match to validate the Origin header against the alloworiginpat configuration. Since re.match only anchors at the start of the string, an attacker who controls a domain like http://trusted.example.com.evil.com/ passes validation against a pattern intended to match only...

EUVD-2026-27510

Jupyter Server has a CORS Origin Validation Bypass via re.match in alloworiginpat from huntr...

Regular Expression without Anchors

Overview Affected versions of this package are vulnerable to Regular Expression without Anchors through the alloworiginpat checks in websocket.py, login.py. An attacker can bypass CORS, WebSocket origin checks, and login redirect validation by supplying an Origin or Referer value that matches the...

CWE-346: CORS Origin Validation Bypass via `re.match()` in `allow_origin_pat`

This report is not public...