CVE-2026-57493 error311 CVE debrief

Who should care

Defenders responsible for FileRise installations should assess exposure and prioritize upgrading to version 3.16.0 or later. This includes reviewing existing tokens for potential revocation and monitoring for suspicious activity related to FileRise. Additionally, defenders should verify the current version of FileRise in use and plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Why it matters

CVE-2026-57493 allows users to potentially retain admin access after demotion due to FileRise's improper use of stale admin roles from remember-me tokens. Defenders should prioritize verification, token revocation, and upgrading to version 3.16.0 or later.

• Potential retention of admin access after user demotion
• Need to verify and revoke existing tokens
• Priority on upgrading to version 3.16.0 or later

Technical summary

FileRise's remember-me auto-login feature stores the isAdmin flag in tokens and restores the stale value during automatic login, instead of resolving the account's current role from users.txt. This issue allows users who were issued a token while an administrator to potentially retain administrator access after demotion. The vulnerability is fixed in version 3.16.0, where the isAdmin flag is no longer stored in remember-me tokens, and the current role is resolved during automatic login. Defenders should prioritize verifying and upgrading to FileRise version 3.16.0 or later.

Defensive priority

Defenders should prioritize verifying and upgrading to FileRise version 3.16.0 or later, and review existing tokens for potential revocation.

Recommended defensive actions

• Verify and upgrade to FileRise version 3.16.0 or later
• Review existing tokens for potential revocation
• Monitor for suspicious activity related to FileRise
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• technicalSummary

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and fixed version. The issue is confirmed in FileRise versions prior to 3.16.0. Defenders should verify the current version of FileRise in use and prioritize upgrading to version 3.16.0 or later. The CVE Program record and NIST NVD detail page offer additional information on the vulnerability and its impact.

Sources and 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.