CVE-2026-40110
2 advisories.
PyPI/jupyter-server CVE-2026-40110: high, EPSS 0.47%
Jupyter Server has a CORS Origin Validation Bypass via `re.match()` in `allow_origin_pat`
Action: Upgrade jupyter-server to 2.18.0 or later.
pip install jupyter-server==2.18.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.18.0 | - |
Fixed versions
| 2.18.0 |
Sources
- osv: GHSA-24qx-w28j-9m6p
- 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://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/security/cve/CVE-2026-40110
- https://bugzilla.redhat.com/show_bug.cgi?id=2466912
- https://github.com/jupyter-server/jupyter_server
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2026-2187.yaml
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40110.json
CVE-2026-40110 · published · modified · JSON
PyPI/jupyter-server CVE-2026-40110: high 7.3, EPSS 0.47%
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
Action: Upgrade jupyter-server to 2.18.0 or later.
pip install jupyter-server==2.18.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.18.0 | - |
Fixed versions
| 2.18.0 |
Sources
- osv: PYSEC-2026-2187
- https://access.redhat.com/security/cve/CVE-2026-40110
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40110.json
- https://bugzilla.redhat.com/show_bug.cgi?id=2466912
- 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/security/advisories/GHSA-24qx-w28j-9m6p
CVE-2026-40110 · published · modified · JSON