TI-2026-70945 Aliases CVE-2026-108950 GHSA-2j53-hvmv-r3h4

Missing authorization in OSSN exposes album photos and stored files

LOW 36CWE-862Published 2026-10-12 · Updated 2026-10-18

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Open Source Social Network (OSSN) through 10.1 contains a missing authorization flaw (CWE-862) in the album photo handler, which performs no access check. An unauthenticated remote attacker can download files by enumerating sequential file GUIDs, including friends-only album photos and other stored files. An exploit link is listed in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00326 25th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
opensource-socialnetwork	opensource-socialnetwork	up to 10.1	—	No fix listed	CNA

opensource-socialnetwork Vendoropensource-socialnetwork Affected up to 10.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for opensource-socialnetwork.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-12 Threatist record created from CVE-2026-108950
2026-10-12 Alias added: GHSA-2j53-hvmv-r3h4
2026-10-13 Priority changed: MEDIUM → LOW
2026-10-18 CISA SSVC decision points changed

References

Exploit 1

https://hackmd.io/@leediay/multiple-ossn-v10_vulnerable

Patch 1

https://github.com/opensource-socialnetwork/opensource-socialnetwork/commit/cb7c24e70f8c4470ee485caac4889885d2e120b3

Other 3

TI-2026-70532 Authorization bypass in OSSN exposes private message attachments CVSS 4.0HIGH 7.1
TI-2026-29910 Open Source Social Network (OSSN) Vulnerable to Resource Exhaustion via Malicious Image Processing CVSS 3.1HIGH 8.2
TI-2025-39373 OSSN (Open Source Social Network) 8.6 is vulnerable to SQL Injection in… CVSS 3.1MEDIUM 6.5
TI-2020-08475 An issue was discovered in Open Source Social Network (OSSN) through 5.3. CVSS 3.1MEDIUM 5.9
TI-2025-39316 Open Source Social Network (OSSN) 8.6 is vulnerable to Cross Site Scripting (XSS) via the… CVSS 3.1HIGH 7.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences