CVE-2026-8186

Description

A vulnerability was detected in Open5GS up to 2.7.7. This affects the function ogs_sbi_client_send_via_scp_or_sepp in the library lib/sbi/client.c of the component NF. Performing a manipulation results in out-of-bounds read. The attack is possible to be carried out remotely. The patch is named d5bc487fcf9ea87d2b03f2ef95123af344773bfb. It is suggested to install a patch to address this issue.

Overview

State: PUBLISHED
Assigner (CNA): VulDB
CVSS severity: MEDIUM
CVSS score: 6.9 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
Effective score: 6.9 / 10 MEDIUM source: CNA overview
CWE(s): CWE-125, CWE-119
Reserved: 2026-05-08
Published: 2026-05-09 14:00 UTC
Last updated: 2026-05-11 17:01 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/8xxx/CVE-2026-8186.json
Linked Threat: CVE-2026-8186 — CVE-2026-8186

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-09 12:16:08 UTC
NVD last modified: 2026-05-13 16:09:17 UTC
NVD CVSS v3.1: 5.3 / 10 MEDIUM source: cna@vuldb.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploitability subscore: 3.9 / 10
Impact subscore: 1.4 / 10
EPSS score: 0.0009 (probability of exploitation in next 30 days)
EPSS percentile: 24.56% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-28912
Assigner: VulDB
Published: May 9, 2026, 12:00:15 PM
Updated: May 11, 2026, 3:01:57 PM
EUVD base score (CVSS 4.0): 6.9 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
EUVD-reported EPSS: 0.0900
Vendors: n/a
Products: Open5GS (2.7.7)

Open5GS (2.7.0)

Open5GS (2.7.1)

Open5GS (2.7.5)

Open5GS (2.7.6)

Open5GS (2.7.2)

Open5GS (2.7.4)

Open5GS (2.7.3)

ENISA description: A vulnerability was detected in Open5GS up to 2.7.7. This affects the function ogs_sbi_client_send_via_scp_or_sepp in the library lib/sbi/client.c of the component NF. Performing a manipulation results in out-of-bounds read. The attack is possible to be carried out remotely. The patch is named d5bc487fcf9ea87d2b03f2ef95123af344773bfb. It is suggested to install a patch to address this issue.

EUVD references (7)

Affected products (1)

Vendor	Product	Versions	Platforms
n/a	Open5GS	`2.7.0` (affected), `2.7.1` (affected), `2.7.2` (affected), `2.7.3` (affected), `2.7.4` (affected), `2.7.5` (affected), `2.7.6` (affected), `2.7.7` (affected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

Vendor references (7)

References embedded in the original CVE record by the assigning CNA.

VDB-362338 | Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out-of-bounds vdb-entrytechnical-description
VDB-362338 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
Submit #800024 | Open5GS 2.7.7 Out-of-bounds Read (CWE-125) / Denial of Service (CWE-400) third-party-advisory
https://github.com/open5gs/open5gs/issues/4491 issue-tracking
https://github.com/open5gs/open5gs/pull/4496 issue-trackingpatch
https://github.com/open5gs/open5gs/commit/d5bc487fcf9ea87d2b03f2ef95123af344773bfb patch
https://github.com/open5gs/open5gs/ product

MITRE references (7) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://github.com/open5gs/open5gs/pull/4496 issue-tracking, patch
https://github.com/open5gs/open5gs/ product
VDB-362338 | Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out-of-bounds vdb-entry, technical-description
VDB-362338 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #800024 | Open5GS 2.7.7 Out-of-bounds Read (CWE-125) / Denial of Service (CWE-400) third-party-advisory
https://github.com/open5gs/open5gs/commit/d5bc487fcf9ea87d2b03f2ef95123af344773bfb patch
https://github.com/open5gs/open5gs/issues/4491 issue-tracking

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://nvd.nist.gov/vuln/detail/CVE-2026-8186 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-8186 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.org

NVD-tagged references (8)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/open5gs/open5gs/ cna@vuldb.com Product
https://github.com/open5gs/open5gs/commit/d5bc487fcf9ea87d2b03f2ef95123af344773bfb cna@vuldb.com Patch
https://github.com/open5gs/open5gs/issues/4491 cna@vuldb.com ExploitIssue Tracking
https://github.com/open5gs/open5gs/issues/4491 134c704f-9b21-4f2e-91b3-4a467353bcc0 ExploitIssue Tracking
https://github.com/open5gs/open5gs/pull/4496 cna@vuldb.com Issue TrackingPatch
https://vuldb.com/submit/800024 cna@vuldb.com Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/362338 cna@vuldb.com Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/362338/cti cna@vuldb.com Permissions RequiredVDB Entry

Remediations (13)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft and Adobe Patch Tuesday, March 2026 Security Update Review

web:blog.qualys.com

Microsoft has rolled out its March 2026 Patch Tuesday updates, delivering a fresh batch of security fixes designed to keep Windows environments protected from emerging threats.

2026-05-23 21:04 UTC
Microsoft Patch Tuesday March 2026 - 78 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...

2026-05-23 21:04 UTC
Microsoft Patch Tuesday, March 2026 Edition - Krebs on Security

web:krebsonsecurity.com

Here are a few highlights from this month's Patch Tuesday. Image: Shutterstock, @nwz. Two of the bugs Microsoft patched today were publicly disclosed previously.

2026-05-23 21:04 UTC
Nvd - Cve-2026-8486

web:nvd.nist.gov

An official website of the United States government Here's how you know

2026-05-23 21:04 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-23 21:04 UTC
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws

web:www.bleepingcomputer.com

Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.

2026-05-23 21:04 UTC
March 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft's March 2026 Patch Tuesday addresses 82 CVEs , featuring eight Critical vulnerabilities.

2026-05-23 21:04 UTC
Microsoft's March 2026 update fixes 80+ security vulnerabilities

web:www.pcworld.com

This month's Patch Tuesday brings over 80 fixes for various security vulnerabilities. Fortunately, none are actively being exploited in the wild yet.

2026-05-23 21:04 UTC
Patch Alert: Microsoft Fixes Nearly 80 Bugs, Including ... - TechRepublic

web:www.techrepublic.com

Microsoft's March Patch Tuesday fixes 78 vulnerabilities, including Office preview pane flaws, an Excel Copilot data leak risk, and an AI-discovered 9.8 severity bug.

2026-05-23 21:04 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-23 21:04 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-05-26 02:49 UTC
Microsoft Patch Tuesday - March 2026 - Lansweeper

web:www.lansweeper.com

The March 2026 edition of Patch Tuesday brings us 88 fixes, with 3 rated as critical. We've listed the most important changes below. Microsoft Excel Information Disclosure Vulnerability CVE - 2026 -26144 is a critical information disclosure flaw in Microsoft Excel caused by improper input neutralization during web page generation.

2026-05-26 02:49 UTC
I tested Windows 11 March 2026 Updates: Everything new ... - Windows Latest

web:www.windowslatest.com

Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.

2026-05-26 02:49 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-8186.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8186",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T15:01:52.867095Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-11T15:01:57.234Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/open5gs/open5gs/issues/4491"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "NF"
          ],
          "product": "Open5GS",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.7.0"
            },
            {
              "status": "affected",
              "version": "2.7.1"
            },
            {
              "status": "affected",
              "version": "2.7.2"
            },
            {
              "status": "affected",
              "version": "2.7.3"
            },
            {
              "status": "affected",
              "version": "2.7.4"
            },
            {
              "status": "affected",
              "version": "2.7.5"
            },
            {
              "status": "affected",
              "version": "2.7.6"
            },
            {
              "status": "affected",
              "version": "2.7.7"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "0wln3d (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was detected in Open5GS up to 2.7.7. This affects the function ogs_sbi_client_send_via_scp_or_sepp in the library lib/sbi/client.c of the component NF. Performing a manipulation results in out-of-bounds read. The attack is possible to be carried out remotely. The patch is named d5bc487fcf9ea87d2b03f2ef95123af344773bfb. It is suggested to install a patch to address this issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 5,
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-Bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-09T12:00:15.995Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-362338 | Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out-of-bounds",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/362338"
        },
        {
          "name": "VDB-362338 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/362338/cti"
        },
        {
          "name": "Submit #800024 | Open5GS 2.7.7 Out-of-bounds Read (CWE-125) / Denial of Service (CWE-400)",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/800024"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/open5gs/open5gs/issues/4491"
        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/open5gs/open5gs/pull/4496"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/open5gs/open5gs/commit/d5bc487fcf9ea87d2b03f2ef95123af344773bfb"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/open5gs/open5gs/"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-08T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-05-08T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-05-08T21:52:15.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out-of-bounds"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-8186",
    "datePublished": "2026-05-09T12:00:15.995Z",
    "dateReserved": "2026-05-08T19:47:06.554Z",
    "dateUpdated": "2026-05-11T15:01:57.234Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}