Auth bypass in Opensource-Socialnetwork
CVE-2026-108950
Open Source Social Network (OSSN) through 10.1 contains a missing authorization vulnerability in ossn_album_page_handler that allows unauthenticated attackers to download files via album/getphoto and album/getcover. Attackers can enumerate sequential file GUIDs to retrieve friends-only album photos and other stored files without any access check.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/opensource-socialnetwork/opensource-socialnetwork/issues/2641 (issue-tracking)
- github.com/opensource-socialnetwork/opensource-socialnetwork/commit/cb7c24e70f8… (patch)
- hackmd.io/@leediay/multiple-ossn-v10_vulnerable (technical-description, exploit)
- github.com/opensource-socialnetwork/opensource-socialnetwork/blob/48b53f5b95488… (technical-description)
- github.com/opensource-socialnetwork/opensource-socialnetwork (product)
- www.vulncheck.com/advisories/open-source-social-network-ossn-through-10.1-missi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108950?
- CVE-2026-108950 is a medium-severity vulnerability in Opensource-Socialnetwork, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-10-12.
- How severe is CVE-2026-108950?
- Medium severity. CVSS v3 base score is 5.3 out of 10.