VDB-394568 · Submit #885203 · CVE-2026-78186

Open5GS up to 2.8.0 HSS src/hss/hss-cx-path.c User-Name assertion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9	$0-$5k	1.15+

Summaryinfo

A vulnerability was found in Open5GS up to 2.8.0. It has been declared as problematic. This impacts an unknown function of the file src/hss/hss-cx-path.c of the component HSS. Such manipulation of the argument User-Name leads to assertion. This vulnerability is listed as CVE-2026-78186. The attack may be performed from remote. In addition, an exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Open5GS up to 2.8.0. It has been rated as problematic. Affected by this issue is some unknown processing of the file src/hss/hss-cx-path.c of the component HSS. The manipulation of the argument User-Name with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-78186. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

Applying the patch c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4 is able to eliminate this problem. The bugfix is ready for download at github.com.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Open5GS

Version

License

open-source

Website

Product: https://github.com/open5gs/open5gs/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Assertion
CWE: CWE-617
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4

Timelineinfo

08/23/2026 Advisory disclosed
08/23/2026 +0 days VulDB entry created
08/23/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4675
Status: Confirmed

CVE: CVE-2026-78186 (🔒)
GCVE (CVE): GCVE-0-2026-78186
GCVE (VulDB): GCVE-100-394568
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/23/2026 18:49
Changes: 08/23/2026 18:49 (60)
Complete: 🔍
Submitter: WeiYi
Cache ID: 216::103

Submitinfo

Accepted

Submit #885203: open5gs Open5GS 2.8.0 and earlier Reachable Assertion (by WeiYi)