Security readout for executives and security teams
Plain-English summary
CVE-2026-61874 is a low-severity filebrowser issue where public share links can remain active after a shared folder is deleted in a specific path-handling case. If that folder is recreated, the old public link may expose new contents. This is mainly a confidentiality risk for organizations using filebrowser public shares.
Executive priority
Treat as a routine but timely fix if filebrowser public shares are used. Prioritize systems exposing shared files externally or handling sensitive data. The business risk is accidental disclosure through old public links, not broad system compromise.
Technical view
filebrowser before 2.63.17 does not normalize paths before querying the share index in DeleteWithPathPrefix. An authenticated user can cause public share cleanup to miss a matching path when deletion uses a trailing slash. Recreating the same directory can make new contents reachable through the dormant public share URL. CVSS is 3.1, confidentiality low.
Likely exposure
Exposure is limited to filebrowser deployments before 2.63.17 that use public shares. Risk is higher where authenticated users can manage shared directories and where public share URLs are reachable by untrusted parties.
Exploitation context
The sources describe authenticated exploitation requiring a specific path-handling condition. CISA KEV is false in the provided bundle, and no cited source states active exploitation. The issue does not provide integrity or availability impact in the CVSS vector.
Researcher notes
Key condition is inconsistent path normalization during share cleanup. Focus validation on share lifecycle behavior and version verification, not unauthenticated access. Evidence is limited to the vendor advisory, patch reference, CVE data, and VulnCheck advisory.
Mitigation direction
- Upgrade filebrowser to 2.63.17 or later.
- Review existing public share links and remove stale or unnecessary shares.
- Check the GitHub advisory for any additional vendor guidance.
- Restrict filebrowser access to trusted authenticated users where feasible.
Validation and detection
- Inventory filebrowser deployments and identify versions before 2.63.17.
- Confirm upgraded deployments include the vendor patch commit.
- Review public share listings for unexpected or dormant shares.
- Check logs for unusual share deletion and directory recreation activity, if available.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-61874 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N1.61.4VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
2.3LowVector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Base CVSS 3.1 score
3.1LowVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 sourceCVE List V5
- GitHub Security Advisory (GHSA-pp88-jhwj-5qh5)CVE reference, VulnCheck · vendor-advisory
- https://github.com/filebrowser/filebrowser/commit/be23ab3a15bf957928ecfed88de5ab67850c1b9cCVE reference, VulnCheck · patch
- VulnCheck Advisory: filebrowser before 2.63.17 Stale Public Share via Trailing-Slash DeleteCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE mapping pending import
This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.