Vulnerability-Lookup

CVE-2026-12383 (GCVE-0-2026-12383)

Vulnerability from cvelistv5 – Published: 2026-07-27 19:12 – Updated: 2026-08-04 20:48

Title

Eda-server: externaleventstreamviewset trusts subject header without validation and leaks expected dn

Summary

A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-27 19:31 UTC

CWE

CWE-345 - Insufficient Verification of Data Authenticity

Assigner

redhat redhat root

References

5 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:50319	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50336	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50340	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-12383	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2489127	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Ansible Automation Platform 2.5 for RHEL 8	Unaffected: 0:1.1.21-1.el8ap , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.5::el8 cpe:/a:redhat:ansible_automation_platform:2.5::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
Red Hat	Red Hat Ansible Automation Platform 2.5 for RHEL 9	Unaffected: 0:1.1.21-1.el9ap , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.5::el8 cpe:/a:redhat:ansible_automation_platform:2.5::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
Red Hat	Red Hat Ansible Automation Platform 2.6 for RHEL 9	Unaffected: 0:1.2.11-1.el9ap , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.6::el10 cpe:/a:redhat:ansible_automation_platform:2.6::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9
Red Hat	Red Hat Ansible Automation Platform 2.7	Unaffected: 1785374869 , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.7::el9

Date Public

2026-07-27 19:04

Credits

This issue was discovered by Chris Meyers (Red Hat).

Show details on NVD website

JSON

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                "cpe:/a:redhat:ansible_automation_platform:2.6::el9",
                "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10",
                "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9",
                "cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9"
              ],
              "defaultStatus": "affected",
              "packageName": "automation-eda-controller",
              "product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
              "vendor": "Red Hat",
              "versions": [
                {
                  "lessThan": "*",
                  "status": "unaffected",
                  "version": "0:1.2.11-1.el9ap",
                  "versionType": "rpm"
                }
              ]
            },
            {
              "collectionURL": "https://catalog.redhat.com/software/containers/",
              "cpes": [
                "cpe:/a:redhat:ansible_automation_platform:2.7::el9"
              ],
              "defaultStatus": "affected",
              "packageName": "ansible-automation-platform-27/eda-controller-rhel9",
              "product": "Red Hat Ansible Automation Platform 2.7",
              "vendor": "Red Hat",
              "versions": [
                {
                  "lessThan": "*",
                  "status": "unaffected",
                  "version": "1785374869",
                  "versionType": "rpm"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "value": "This issue was discovered by Chris Meyers (Red Hat)."
            }
          ],
          "datePublic": "2026-07-27T19:04:53.794Z",
          "descriptions": [
            {
              "lang": "en",
              "value": "A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions."
            }
          ],
          "metrics": [
            {
              "other": {
                "content": {
                  "namespace": "https://access.redhat.com/security/updates/classification/",
                  "value": "Important"
                },
                "type": "Red Hat severity rating"
              }
            },
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "format": "CVSS"
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-345",
                  "description": "Insufficient Verification of Data Authenticity",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-04T20:48:52.041Z",
            "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
            "shortName": "redhat"
          },
          "references": [
            {
              "name": "RHSA-2026:50319",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:50319"
            },
            {
              "name": "RHSA-2026:50336",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:50336"
            },
            {
              "name": "RHSA-2026:50340",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2026:50340"
            },
            {
              "tags": [
                "vdb-entry",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/security/cve/CVE-2026-12383"
            },
            {
              "name": "RHBZ#2489127",
              "tags": [
                "issue-tracking",
                "x_refsource_REDHAT"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489127"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-06-16T10:09:09.069Z",
              "value": "Reported to Red Hat."
            },
            {
              "lang": "en",
              "time": "2026-07-27T19:04:53.794Z",
              "value": "Made public."
            }
          ],
          "title": "Eda-server: externaleventstreamviewset trusts subject header without validation and leaks expected dn",
          "workarounds": [
            {
              "lang": "en",
              "value": "The following practices would help for avoiding exposure and mitigate this flaw:\n\n- Ensure the EDA server is not directly accessible from untrusted networks; all traffic should route through the AAP Gateway which should perform mTLS validation.\n- If possible, configure network-level access controls to restrict which source IPs can reach the EDA backend API.\n- Monitor EDA event streams for unexpected events_received counter changes.\n- Review and rotate mTLS client certificates if unauthorized access is suspected, as the expected DN may have been leaked via the 403 error response."
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_redhatCweChain": "CWE-345: Insufficient Verification of Data Authenticity"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2026-12383",
        "datePublished": "2026-07-27T19:12:29.271Z",
        "dateReserved": "2026-06-16T10:07:26.251Z",
        "dateUpdated": "2026-08-04T20:48:52.041Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-12383

Vulnerability from fkie_nvd - Published: 2026-07-27 19:17 - Updated: 2026-08-04 21:16

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:50319
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:50336
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:50340
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-12383
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2489127

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.5::el8",
            "cpe:/a:redhat:ansible_automation_platform:2.5::el9",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9",
            "cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8",
            "cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "automation-eda-controller",
          "product": "Red Hat Ansible Automation Platform 2.5 for RHEL 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.1.21-1.el8ap",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.5::el8",
            "cpe:/a:redhat:ansible_automation_platform:2.5::el9",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9",
            "cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8",
            "cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "automation-eda-controller",
          "product": "Red Hat Ansible Automation Platform 2.5 for RHEL 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.1.21-1.el9ap",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.6::el10",
            "cpe:/a:redhat:ansible_automation_platform:2.6::el9",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10",
            "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9",
            "cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "automation-eda-controller",
          "product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.2.11-1.el9ap",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2.7::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "ansible-automation-platform-27/eda-controller-rhel9",
          "product": "Red Hat Ansible Automation Platform 2.7",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1785374869",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions."
    }
  ],
  "id": "CVE-2026-12383",
  "lastModified": "2026-08-04T21:16:34.993",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-12383",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-27T19:31:53.427622Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-27T19:17:14.820",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:50319"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:50336"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:50340"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-12383"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489127"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-C4XF-FV75-HWXM

Vulnerability from github – Published: 2026-07-27 21:31 – Updated: 2026-08-04 21:30

Details

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-12383"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-27T19:17:14Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions.",
  "id": "GHSA-c4xf-fv75-hwxm",
  "modified": "2026-08-04T21:30:25Z",
  "published": "2026-07-27T21:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12383"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:50319"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:50336"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:50340"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-12383"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489127"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

RHSA-2026:50319

Vulnerability from csaf_redhat - Published: 2026-08-04 18:10 - Updated: 2026-09-21 22:26

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update

Severity

Important

Scope

17 vulnerabilities in this advisory, including CVE-2026-12383.

CVE-2026-12383

7.5 (High)


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

Fixed: 12 products Known not affected: 178 products

https://access.redhat.com/errata/RHSA-2026:50319

Open the full advisory

RHSA-2026:50336

Vulnerability from csaf_redhat - Published: 2026-08-04 18:56 - Updated: 2026-09-21 22:26

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

Severity

Important

Scope

17 vulnerabilities in this advisory, including CVE-2026-12383.

CVE-2026-12383

7.5 (High)


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

Fixed: 6 products Known not affected: 143 products

https://access.redhat.com/errata/RHSA-2026:50336

Open the full advisory

RHSA-2026:50340

Vulnerability from csaf_redhat - Published: 2026-08-04 18:38 - Updated: 2026-09-21 20:37

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.7 Container Release Update

Severity

Important

Scope

18 vulnerabilities in this advisory, including CVE-2026-12383.

CVE-2026-12383

7.5 (High)


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

Fixed: 2 products Known not affected: 60 products

https://access.redhat.com/errata/RHSA-2026:50340

Open the full advisory

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.

Related by attack behaviour

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.

Action not permitted

CVE-2026-12383 (GCVE-0-2026-12383)

FKIE_CVE-2026-12383

GHSA-C4XF-FV75-HWXM

RHSA-2026:50319

RHSA-2026:50336

RHSA-2026:50340

Tags

Sightings

Nomenclature

Related by attack behaviour