CVE-2026-8266 | THREATINT

Description

A vulnerability was detected in Open5GS up to 2.7.7. This affects the function gsm_build_pdu_session_establishment_accept of the file /src/smf/gsm-build.c of the component SMF. The manipulation results in denial of service. The attack can be launched remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

PUBLISHED Reserved 2026-05-10 | Published 2026-05-11 | Updated 2026-05-11 | Assigner VulDB

MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

MEDIUM: 4.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

4.0AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Denial of Service

Timeline

2026-05-10:	Advisory disclosed
2026-05-10:	VulDB entry created
2026-05-10:	VulDB entry last update

Credits

FrankLin (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/362563 (VDB-362563 | Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_accept denial of service) vdb-entry technical-description

vuldb.com/vuln/362563/cti (VDB-362563 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/808483 (Submit #808483 | Open5gs SMF v2.7.7 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4447 exploit issue-tracking

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-8266)

nvd.nist.gov (CVE-2026-8266)

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