DEBIAN-CVE-2026-40110
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-40110
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40110.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40110
- Upstream
- Published
- 2026-05-05T22:16:00Z
- Modified
- 2026-09-14T17:03:10Z
- Severity
-
- 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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 allow_origin_pat configuration value. Because re.match() only anchors at the start of the string and does not require a full match, a pattern intended to match only a trusted domain (e.g., trusted.example.com) will also match any origin that begins with that domain followed by additional characters (e.g., trusted.example.com.evil.com). An attacker who controls such a domain can bypass the CORS origin restriction and make cross-origin requests to the Jupyter Server API from an untrusted site. This issue has been fixed in version 2.18.0.
- References
Affected packages
Debian:12 / jupyter-server
Package
- Name
- jupyter-server
- Purl
- pkg:deb/debian/jupyter-server?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / jupyter-server
Package
- Name
- jupyter-server
- Purl
- pkg:deb/debian/jupyter-server?arch=source&distro=trixie
Debian:14 / jupyter-server
Package
- Name
- jupyter-server
- Purl
- pkg:deb/debian/jupyter-server?arch=source&distro=forky