Open5GS up to 2.7.7 SMF /src/smf/gsm-build.c gsm_build_pdu_session_establishment_accept denial of service

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Open5GS up to 2.7.7. It has been classified as problematic. This vulnerability affects the function gsm_build_pdu_session_establishment_accept of the file /src/smf/gsm-build.c of the component SMF. This manipulation causes denial of service. This vulnerability appears as CVE-2026-8266. 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 was found in Open5GS up to 2.7.7. It has been declared as problematic. Affected by this vulnerability is the function gsm_build_pdu_session_establishment_accept of the file /src/smf/gsm-build.c of the component SMF. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-8266. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

Website

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

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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

05/10/2026 Advisory disclosed
05/10/2026 +0 days VulDB entry created
05/10/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4447
Status: Not defined

CVE: CVE-2026-8266 (🔒)
GCVE (CVE): GCVE-0-2026-8266
GCVE (VulDB): GCVE-100-362563
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/10/2026 17:49
Changes: 05/10/2026 17:49 (57)
Complete: 🔍
Submitter: FrankLin
Cache ID: 216::103

Submitinfo

Accepted

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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