CVE-2026-8187
Open5GS UPF gtp-path.c _gtpv1_u_recv_cb resource consumption
Description
A flaw has been found in Open5GS up to 2.7.7. This impacts the function _gtpv1_u_recv_cb of the file src/upf/gtp-path.c of the component UPF. Executing a manipulation can lead to resource consumption. The attack may be performed from remote. The project was informed of the problem early through an issue report but has not responded yet.
INFO
Published Date :
May 9, 2026, 11:16 a.m.
Last Modified :
May 13, 2026, 4:08 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Open5GS to a version later than 2.7.7.
- Monitor resource consumption on UPF.
- Investigate received GTPv1 packets for manipulation.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-8187.
| URL | Resource |
|---|---|
| https://github.com/open5gs/open5gs/ | Product |
| https://github.com/open5gs/open5gs/issues/4492 | Exploit Issue Tracking |
| https://vuldb.com/submit/800025 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/362339 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/362339/cti | Permissions Required VDB Entry |
| https://github.com/open5gs/open5gs/issues/4492 | Exploit Issue Tracking |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8187 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-8187
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8187 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-8187 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:* versions up to (including) 2.7.7 Added Reference Type VulDB: https://github.com/open5gs/open5gs/ Types: Product Added Reference Type CISA-ADP: https://github.com/open5gs/open5gs/issues/4492 Types: Exploit, Issue Tracking Added Reference Type VulDB: https://github.com/open5gs/open5gs/issues/4492 Types: Exploit, Issue Tracking Added Reference Type VulDB: https://vuldb.com/submit/800025 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/362339 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/362339/cti Types: Permissions Required, VDB Entry -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 11, 2026
Action Type Old Value New Value Added Reference https://github.com/open5gs/open5gs/issues/4492 -
New CVE Received by [email protected]
May. 09, 2026
Action Type Old Value New Value Added Description A flaw has been found in Open5GS up to 2.7.7. This impacts the function _gtpv1_u_recv_cb of the file src/upf/gtp-path.c of the component UPF. Executing a manipulation can lead to resource consumption. The attack may be performed from remote. The project was informed of the problem early through an issue report but has not responded yet. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CWE CWE-404 Added CWE CWE-400 Added Reference https://github.com/open5gs/open5gs/ Added Reference https://github.com/open5gs/open5gs/issues/4492 Added Reference https://vuldb.com/submit/800025 Added Reference https://vuldb.com/vuln/362339 Added Reference https://vuldb.com/vuln/362339/cti