Open5GS up to 2.7.7 NRF nghttp2-server.c discover_handler use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Open5GS up to 2.7.7. This affects the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. This manipulation causes use after free. This vulnerability appears as CVE-2026-8746. The attack may be initiated remotely. In addition, an exploit is available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability has been found in Open5GS up to 2.7.7 and classified as problematic. Affected by this vulnerability is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-8746. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

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

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 4.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/16/2026 Advisory disclosed
05/16/2026 +0 days VulDB entry created
05/21/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4476
Status: Not defined

CVE: CVE-2026-8746 (🔒)
GCVE (CVE): GCVE-0-2026-8746
GCVE (VulDB): GCVE-100-364333
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/16/2026 14:43
Updated: 05/21/2026 14:33
Changes: 05/16/2026 14:43 (57), 05/21/2026 14:33 (41)
Complete: 🔍
Submitter: ZiyuLin
Cache ID: 216::103

Submitinfo

Accepted

Duplicate

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