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CVE-2026-46410 gtsteffaniak CVE debrief

CVE-2026-46410 is a high-severity vulnerability in FileBrowser Quantum, a free, self-hosted, web-based file manager. Versions prior to 1.3.2-stable and 1.4.1-beta may leak some sensitive info, such as source and path. The CVSS score is 8.7, indicating a high severity level. The vulnerability class is related to sensitive information leaks. The affected product is FileBrowser Quantum. The likely operational impact is sensitive information disclosure.

Vendor
gtsteffaniak
Product
filebrowser
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-20
Original CVE updated
2026-07-22
Advisory published
2026-07-20
Advisory updated
2026-07-22

Who should care

Users of FileBrowser Quantum versions prior to 1.3.2-stable and 1.4.1-beta should apply the patches to prevent potential sensitive information leaks. Affected operators include FileBrowser Quantum administrators and users. The vulnerability-management impact is high, as the vulnerability has a high CVSS score. Security teams should prioritize patching affected instances.

Technical summary

The vulnerability affects FileBrowser Quantum versions prior to 1.3.2-stable and 1.4.1-beta. It may leak sensitive information, such as source and path. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/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. The vulnerability has a high CVSS score, indicating a high severity level.

Defensive priority

High priority should be given to patching FileBrowser Quantum instances, as the vulnerability has a high CVSS score and may lead to sensitive information leaks.

Recommended defensive actions

  • Apply patches to upgrade to version 1.3.2-stable or 1.4.1-beta
  • Review and update inventory of FileBrowser Quantum instances
  • Monitor for potential sensitive information leaks
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-20T15:16:38.673Z and was last modified on 2026-07-21T15:16:34.793Z. The NVD entry is currently Received. The vulnerability affects FileBrowser Quantum versions prior to 1.3.2-stable and 1.4.1-beta. Evidence of exploitation is not currently available, but defenders should verify affected scope and severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46410 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46410

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46410 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46410

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.