CVE-2026-8746 Details
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.
A use-after-free vulnerability has been identified in Open5GS versions prior to 2.7.7, specifically within the NRF component. The issue arises in the 'discover_handler' function of the 'nghttp2-server.c' library. This vulnerability can be exploited remotely, leading to a crash of the NRF service. The problem occurs during inter-PLMN discovery forwarding when a delayed Home-NRF response is received after the original client has disconnected, causing the NRF to reuse a freed stream pointer and abort the operation.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 18, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://vuldb.com/submit/817032 | CISA-ADP | Third Party AdvisoryVDB Entry |
| https://github.com/open5gs/open5gs/ | [email protected] | Product |
| https://github.com/open5gs/open5gs/issues/4476 | [email protected] | ExploitIssue Tracking |
| https://vuldb.com/submit/817032 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/364333 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/364333/cti | [email protected] | Permissions RequiredVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| open5gs open5gs | <= 2.7.7 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | Initial Analysis | [email protected] |
| May 17, 2026 | New CVE Received | [email protected] |