CVE-2026-8746 | THREATINT

Description

A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

PUBLISHED Reserved 2026-05-16 | Published 2026-05-17 | Updated 2026-05-17 | 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

Use After Free

Memory Corruption

Timeline

2026-05-16:	Advisory disclosed
2026-05-16:	VulDB entry created
2026-05-16:	VulDB entry last update

Credits

ZiyuLin (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/364333 (VDB-364333 | Open5GS NRF nghttp2-server.c discover_handler use after free) vdb-entry technical-description

vuldb.com/vuln/364333/cti (VDB-364333 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/817032 (Submit #817032 | Open5GS NRF v2.7.7 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4476 exploit issue-tracking

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-8746)

nvd.nist.gov (CVE-2026-8746)

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