CVE-2026-28201: An improper input validation, together with an overly permissive default CORS configuration in Open Notebook v

Q: How do I fix CVE-2026-28201?

open-notebook: upgrade to 1.8.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-28201 being exploited?

CVE-2026-28201 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28201 affect?

CVE-2026-28201 affects open-notebook. Severity is high (CVSS 7.8). 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 malici

Routine

HIGH 7.8UPGRADE

CVE-2026-28201 is a high-severity flaw (CVSS 7.8) affecting open-notebook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-20, CWE-352, CWE-917
Published	2026-05-07
Last modified	2026-06-17

Publisher (CNA): ENISA · Vendor: lfnovo

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-07 11:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

lfnovo open-notebook UPGRADE

Affected: < 1.8.3

Fixed in: 1.8.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy open-notebook || rpm -q open-notebook || open-notebook --version

2. UPGRADE to 1.8.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-notebook

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-notebook

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28201?

open-notebook: upgrade to 1.8.3. Exact commands for each OS are on this page.

Is CVE-2026-28201 being exploited?

CVE-2026-28201 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28201 affect?

CVE-2026-28201 affects open-notebook. Severity is high (CVSS 7.8). 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 malici

How urgent is CVE-2026-28201?

Priority 28/100. High severity

Related CVEs

CVE-2026-33589 MEDIUM 6.5 UPGRADE Lack of user input validation in the file upload functionality of Open Notebook v1.8.3 allows the application
CVE-2026-33588 HIGH 8.1 UPGRADE Lack of user input validation in the file upload functionality of Open Notebook v1.8.3 allows the application
CVE-2026-33587 CRITICAL 10.0 UPGRADE Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (an

References

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