CVE-2026-34530 json
File Browser is vulnerable to Stored Cross-Site Scripting via text/template branding injection
published 7mo ago modified 4mo ago also EUVD-2026-18055 , GHSA-xfqj-3vmx-63wv , GO-2026-5754
- cvss
- 6.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the SPA index page in File Browser is vulnerable to Stored Cross-Site Scripting (XSS) via admin-controlled branding fields. An admin who sets branding.name to a malicious payload injects persistent JavaScript that executes for ALL visitors, including unauthenticated users. This issue has been patched in version 2.62.2.
Patch / fix
- go github.com/filebrowser/filebrowser/v2 2.62.2
- filebrowser filebrowser 2.62.2
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Is CVE-2026-34530 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/filebrowser/filebrowser/security/advisories/GHSA-xfqj-3vmx-63wv referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N |
| GitHub | 3.1 | 6.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/filebrowser/filebrowser/v2 | <2.62.2 |
2.62.2 |
| go | github.com/filebrowser/filebrowser | all versions |
no fix listed |
Affected products
- filebrowser filebrowser
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/filebrowser/filebrowser/security/advisories/GHSA-xfqj-3vmx-63wv
web, exploit, vendor-advisory, advisory
-
github.com
/filebrowser/filebrowser/releases/tag/v2.62.2
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-34530
advisory
-
github.com
/filebrowser/filebrowser
package
Sources
- CVE List CVE-2026-34530
- GitHub Advisory GHSA-xfqj-3vmx-63wv
- NVD CVE-2026-34530
- OSV GO-2026-5754
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.