CVE-2026-34529 json
File Browser is vulnerable to Stored Cross-site Scripting via crafted EPUB file
published 2026-03-31 7 mo ago modified 2026-06-25 4 mo ago also EUVD-2026-18052 , GHSA-5vpr-4fgw-f69h , GO-2026-5156
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- 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 EPUB preview function in File Browser is vulnerable to Stored Cross-Site Scripting (XSS). JavaScript embedded in a crafted EPUB file executes in the victim's browser when they preview the file. 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
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5vpr-4fgw-f69h referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N |
| GitHub | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N |
| NVD | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
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-5vpr-4fgw-f69h
web, exploit, vendor-advisory, advisory
-
github.com
/filebrowser/filebrowser/releases/tag/v2.62.2
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-34529
advisory
-
github.com
/filebrowser/filebrowser
package
Sources
- CVE List CVE-2026-34529
- GitHub Advisory GHSA-5vpr-4fgw-f69h
- NVD CVE-2026-34529
- OSV GO-2026-5156
Fencer Vulns 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.