CVE-2026-78186: Reachable Assertion in Open5GS
Description
CVE-2026-78186 is a medium severity vulnerability in Open5GS up to version 2.8.0. It involves a reachable assertion flaw in the HSS component, specifically in the src/hss/hss-cx-path.c file. The vulnerability is triggered by manipulation of the User-Name argument and can be exploited remotely. An exploit has been published. A patch identified by commit c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4 is available to fix this issue.
CVSS v4.0
Score 5.3medium
Affected software
Open5GS
pkg:github/open5gs/open5gscpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Open5GS affects the HSS component's handling of the User-Name argument in the src/hss/hss-cx-path.c file, causing a reachable assertion failure. The flaw exists in all versions up to and including 2.8.0. The vulnerability can be exploited remotely without user interaction and requires low privileges. The CVSS 4.0 base score is 5.3 (medium severity). A patch has been released to address the issue, referenced by commit c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4.
Potential Impact
Successful exploitation can cause a reachable assertion failure in the HSS component of Open5GS, potentially leading to denial of service or disruption of service. The vulnerability can be exploited remotely with low privileges and no user interaction, but does not involve confidentiality or integrity impact according to the CVSS vector.
Mitigation Recommendations
A patch is available and should be applied to affected Open5GS versions up to 2.8.0. The patch is identified by commit c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4. Applying this patch will remediate the reachable assertion vulnerability. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-23T16:44:41.636Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8bcaa1acd9273b49f0e874
Added to database: 08/24/2026, 04:37:53 UTC
Last enriched: 09/10/2026, 23:02:43 UTC
Last updated: 10/06/2026, 18:48:25 UTC
Views: 75
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