Secuno
ENNL
Book demo

CVE-2026-54053

9.6 CRITICAL
  1. Published17 Sept 2026

Description

Many Notes is a Markdown note-taking web application designed for simplicity. Prior to 0.16.0, the ZIP vault import implemented in app/Actions/ProcessImportedVault.php accepts archive filenames containing parent-directory traversal segments. An authenticated user can write arbitrary files outside the importing user's vault and into other users' vaults, including overwriting existing files. Disguised SVG content can be placed in another user's vault and execute stored cross-site scripting when the victim opens that vault. This issue is fixed in version 0.16.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-451409.8
Chamilo LMS is an open-source learning management system. Prior to 2.0.1, Chamilo LMS…
CVE-2026-158158.8
Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when…
CVE-2026-546179.8
GravitLauncher is an open-source Minecraft launcher based on sashok724's v3. Prior to…
CVE-2026-868648.8
pgAdmin 4's Backup tool appended the client-supplied 'database' field from the…
CVE-2026-929708.8
HUBzero CMS through 2.2.32 contains a path traversal vulnerability in project file…
CVE-2026-929198.1
admin3 through 3.0.0 fails to sanitize client-supplied filenames in the upload handler,…

Frequently asked

Is CVE-2026-54053 being actively exploited?

CVE-2026-54053 is not in the CISA KEV catalog.

How severe is CVE-2026-54053?

CVE-2026-54053 has a CVSS 3.1 base score of 9.6, rated critical.

How do I fix CVE-2026-54053?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-54053 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.