Is CVE-2026-28201 in the CISA KEV catalog?

No. CVE-2026-28201 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-28201?

CVE-2026-28201 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2026-28201?

CVE-2026-28201 has an EPSS score of 0.14% (4th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28201?

Upgrade open-notebook to 1.8.3 or later.

CVE & CISA-KEV Catalog

CVE-2026-28201

HIGH

7.8

CVSS v3

NVD

Description

An improper input validation, together with an overly permissive default CORS configuration in Open Notebook v1.8.1 allows remote attacker to trick a legitimate user to alter or delete arbitrary database entries via specially crafted malicious URL. Depending on the deployment, data exfiltration is also possible.

CWE-20Improper Input Validation CWE-352Cross-Site Request Forgery CWE-917

How to fix

Remediation Available

open-notebookNVD

Affected:< 1.8.3Fixed in:1.8.3CVE-2026-28201derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.14%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Vendor Advisory1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-07.