CVE-2026-40110

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.31% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 23.9% of scored records. A rank, not a probability.

NVD base score

7.6 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Modified. NVD last modified this record on 2026-07-24.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-05 21:29Z5 MO AGO

Last updated

2026-07-22 12:08Z3 MO AGO

Reserved

2026-04-09

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.6)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L

Weaknesses

• CWE-777Regular Expression without AnchorsVariant
• CWE-625Permissive Regular ExpressionBase

Data version

5.2

Document digest

b9e9fb55768616a3f0f08d88598b81d0b007deeac2cc87c5c3ebc06c8da24e79

• github.comhttps://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-24qx-w28j-9m6px_refsource_CONFIRM
• github.comhttps://github.com/jupyter-server/jupyter_server/pull/603x_refsource_MISC
• github.comhttps://github.com/jupyter-server/jupyter_server/commit/057869a327c46730afede3eab0ca2d2e3e74aceax_refsource_MISC
• github.comhttps://github.com/jupyter-server/jupyter_server/commit/49b34392feaa97735b3b777e3baf8f22f2a14ed8x_refsource_MISC
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-40110vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2466912https://bugzilla.redhat.com/show_bug.cgi?id=2466912issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40110.jsonx_sadp-csaf-vex
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:43038vendor-advisoryx_refsource_REDHAT