Vulnerability-Lookup

GHSA-4P7V-9JXW-M3MP

Vulnerability from github – Published: 2026-01-28 18:30 – Updated: 2026-02-23 09:31

Details

A weakness has been identified in Open5GS up to 2.7.6. This vulnerability affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This patch is called b19cf6a. Applying a patch is advised to resolve this issue. The issue report is flagged as already-fixed.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

5.5 (Medium)


                  
                    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:P

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{
  "affected": [],
  "aliases": [
    "CVE-2026-1522"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-404"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-28T17:16:15Z",
    "severity": "MODERATE"
  },
  "details": "A weakness has been identified in Open5GS up to 2.7.6. This vulnerability affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This patch is called b19cf6a. Applying a patch is advised to resolve this issue. The issue report is flagged as already-fixed.",
  "id": "GHSA-4p7v-9jxw-m3mp",
  "modified": "2026-02-23T09:31:22Z",
  "published": "2026-01-28T18:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1522"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/issues/4266"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/issues/4266#event-21968568116"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/issues/4266#issue-3794991595"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/commit/b19cf6a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.343193"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.343193"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.738371"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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:P/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-1522 (GCVE-0-2026-1522)

Vulnerability from cvelistv5 – Published: 2026-01-28 16:32 – Updated: 2026-02-23 09:00 X_Open Source

Title

Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service

Summary

Severity

6.9 (Medium)


                        
                          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:P

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-28 16:41 UTC

CWE

CWE-404 - Denial of Service

Assigner

VulDB mitre root

References

8 references

URL	Tags
https://vuldb.com/?id.343193	vdb-entrytechnical-description
https://vuldb.com/?ctiid.343193	signaturepermissions-required
https://vuldb.com/?submit.738371	third-party-advisory
https://github.com/open5gs/open5gs/issues/4266	issue-tracking
https://github.com/open5gs/open5gs/issues/4266#ev…	issue-tracking
https://github.com/open5gs/open5gs/issues/4266#is…	exploitissue-tracking
https://github.com/open5gs/open5gs/commit/b19cf6a	patch
https://github.com/open5gs/open5gs/	product

Impacted products

1 product

Vendor	Product	Version
n/a	Open5GS	Affected: 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 cpe:2.3:a:open5gs:open5gs::::::::

Credits

FrankyLin (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-1522",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-28T16:41:46.515115Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-28T16:42:10.044Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "SGWC"
          ],
          "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "FrankyLin (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A weakness has been identified in Open5GS up to 2.7.6. This vulnerability affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This patch is called b19cf6a. Applying a patch is advised to resolve this issue. The issue report is flagged as already-fixed."
        }
      ],
      "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:P",
            "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:P/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:P/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:POC/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "Denial of Service",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-23T09:00:29.743Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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      },
      "references": [
        {
          "name": "VDB-343193 | Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/?id.343193"
        },
        {
          "name": "VDB-343193 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.343193"
        },
        {
          "name": "Submit #738371 | Open5GS SGWC v2.7.6 Denial of Service",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.738371"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/open5gs/open5gs/issues/4266"
        },
        {
          "tags": [
            "issue-tracking"
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          "url": "https://github.com/open5gs/open5gs/issues/4266#event-21968568116"
        },
        {
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          "url": "https://github.com/open5gs/open5gs/issues/4266#issue-3794991595"
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          "time": "2026-01-28T00:00:00.000Z",
          "value": "Advisory disclosed"
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        {
          "lang": "en",
          "time": "2026-01-28T01:00:00.000Z",
          "value": "VulDB entry created"
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        {
          "lang": "en",
          "time": "2026-02-03T09:35:54.000Z",
          "value": "VulDB entry last update"
        }
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      "title": "Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service"
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    "dateReserved": "2026-01-28T10:14:15.433Z",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-4P7V-9JXW-M3MP

CVE-2026-1522 (GCVE-0-2026-1522)

Tags

Sightings

Nomenclature

Related by attack behaviour