Medium severity · published Oct 13, 2026
CVE-2026-110230
XBackBone through 3.8.2 Missing Authorization via Upload Vanity Endpoint
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
XBackBone through 3.8.2 contains a missing authorization vulnerability that allows authenticated users to change other users' upload share codes via the POST /upload/{id}/vanity route. Attackers can supply sequential upload ids to MediaController::createVanity() to break existing share links and hijack the freed codes with their own uploads.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XB
XBackBone · sergix44
through 3.8.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-110230
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-110230
patch
https://github.com/sergix44/xbackbone/pull/671
patch
https://github.com/sergix44/xbackbone/commit/5e91a2a9859d20e41ee2e2403cfbe673804f6221
third-party-advisory
https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/ByAj-Xoifl
technical-description
https://github.com/sergix44/xbackbone/blob/226af4f0cec218f563da6d53ececfa4708e6f3e7/app/Controllers/MediaController.php#L204-L229
product
https://github.com/sergix44/xbackbone
third-party-advisory
https://www.vulncheck.com/advisories/xbackbone-through-3.8.2-missing-authorization-via-upload-vanity-endpoint