CVE-2026-40110
high
CVSS v3
7.3
CVSS v2
—
VIR risk
7.3
Description
Jupyter Server has a CORS Origin Validation Bypass via `re.match()` in `allow_origin_pat` (from huntr)
Predictions
Exploit likelihood
82%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-40110
Vendor advisory: security-advisories@github.com — https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-24qx-w28j-9m6p
Vendor advisory: security-advisories@github.com — https://github.com/jupyter-server/jupyter_server/commit/49b34392feaa97735b3b777e3baf8f22f2a14ed8
Vendor advisory: security-advisories@github.com — https://github.com/jupyter-server/jupyter_server/commit/057869a327c46730afede3eab0ca2d2e3e74acea
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | affected | |
| debian | sid | affected | |
| debian | trixie | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | jupyter-server | <2.18.0 | 2.18.0 |
| PIP | jupyter-server | <= 2.17.0 | 2.18.0 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| jupyter | jupyter_server | {"endExcluding":"2.18.0"} | 2.18.0 |
References
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-24qx-w28j-9m6p
- https://nvd.nist.gov/vuln/detail/CVE-2026-40110
- https://github.com/jupyter-server/jupyter_server/pull/603
- https://github.com/jupyter-server/jupyter_server/commit/057869a327c46730afede3eab0ca2d2e3e74acea
- https://github.com/jupyter-server/jupyter_server/commit/49b34392feaa97735b3b777e3baf8f22f2a14ed8
- https://github.com/jupyter-server/jupyter_server
- https://security-tracker.debian.org/tracker/CVE-2026-40110
- https://github.com/advisories/GHSA-24qx-w28j-9m6p
CWEs
CWE-777
Verify integrity in audit chain (admin only). AS-IS.