Vulnerability-Lookup

CVE-2026-76827 (GCVE-0-2026-76827)

Vulnerability from cvelistv5 – Published: 2026-08-19 20:56 – Updated: 2026-09-05 17:08

Title

Search-indexer: search-indexer: update/delete operations not scoped to caller's cluster (cross-tenant data tampering)

Summary

A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix.

Severity

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 16:49 UTC

CWE

CWE-693 - Protection Mechanism Failure

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1212 records in the last 180 days details

References

8 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:60386	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60387	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60388	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60389	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60390	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60391	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-76827	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2519896	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.11	Unaffected: 1787688957 , < * (rpm) cpe:/a:redhat:acm:2.11::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.13	Unaffected: 1787262474 , < * (rpm) cpe:/a:redhat:acm:2.13::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.14	Unaffected: 1787250074 , < * (rpm) cpe:/a:redhat:acm:2.14::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.15	Unaffected: 1787249293 , < * (rpm) cpe:/a:redhat:acm:2.15::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.16	Unaffected: 1787248491 , < * (rpm) cpe:/a:redhat:acm:2.16::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1787247085 , < * (rpm) cpe:/a:redhat:acm:2.17::el9

Date Public

2026-08-19 20:02

Show details on NVD website

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          "workarounds": [
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        "datePublished": "2026-08-19T20:56:17.608Z",
        "dateReserved": "2026-08-19T19:55:53.101Z",
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    }
  }
}

FKIE_CVE-2026-76827

Vulnerability from fkie_nvd - Published: 2026-08-19 21:17 - Updated: 2026-10-26 10:10

Severity

6.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60386
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60387
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60388
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60389
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60390
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60391
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-76827
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2519896

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.11::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-search-indexer-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.11",
          "vendor": "Red Hat",
          "versions": [
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              "lessThan": "*",
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              "versionType": "rpm"
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          "cpes": [
            "cpe:/a:redhat:acm:2.13::el9"
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          "packageName": "rhacm2/acm-search-indexer-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.13",
          "vendor": "Red Hat",
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              "status": "unaffected",
              "version": "1787262474",
              "versionType": "rpm"
            }
          ]
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            "cpe:/a:redhat:acm:2.14::el9"
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          "packageName": "rhacm2/acm-search-indexer-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.14",
          "vendor": "Red Hat",
          "versions": [
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              "lessThan": "*",
              "status": "unaffected",
              "version": "1787250074",
              "versionType": "rpm"
            }
          ]
        },
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          "cpes": [
            "cpe:/a:redhat:acm:2.15::el9"
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              "status": "unaffected",
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-search-indexer-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
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            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787247085",
              "versionType": "rpm"
            }
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        }
      ],
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    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster\u0027s indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster\u0027s prefix."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en search-indexer. Esta vulnerabilidad permite a un cl\u00faster gestionado registrado y autenticado manipular o eliminar los datos de b\u00fasqueda indexados de otro cl\u00faster. Esto es posible porque las rutas de escritura de sincronizaci\u00f3n delta en search-indexer no restringen adecuadamente las operaciones de ACTUALIZACI\u00d3N/ELIMINACI\u00d3N a los datos propiedad del cl\u00faster que realiza la llamada. Un atacante podr\u00eda explotar esto al crear identificadores de usuario espec\u00edficos (UIDs) con el prefijo de un cl\u00faster diferente."
    }
  ],
  "id": "CVE-2026-76827",
  "lastModified": "2026-10-26T10:10:00.140",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 4.0,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2026-76827",
          "options": [
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              "exploitation": "none"
            },
            {
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            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-21T16:49:03.822112Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-19T21:17:39.227",
  "references": [
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      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60386"
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      "url": "https://access.redhat.com/errata/RHSA-2026:60387"
    },
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      "url": "https://access.redhat.com/errata/RHSA-2026:60388"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:60389"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60390"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60391"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-76827"
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    {
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519896"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-693"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-4VRW-8FX2-PJ82

Vulnerability from github – Published: 2026-08-19 21:30 – Updated: 2026-08-27 06:31

Details

Severity

6.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-76827"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-693"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-19T21:17:39Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster\u0027s indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster\u0027s prefix.",
  "id": "GHSA-4vrw-8fx2-pj82",
  "modified": "2026-08-27T06:31:23Z",
  "published": "2026-08-19T21:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76827"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60386"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60387"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60388"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60389"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60390"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60391"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-76827"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519896"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
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RHSA-2026:60386

Vulnerability from csaf_redhat - Published: 2026-08-26 20:08 - Updated: 2026-11-13 16:44

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.17.1 security update

Severity

Important

Scope

62 vulnerabilities in this advisory, including CVE-2026-76827.

CVE-2026-76827

6.8 (Medium)


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

Fixed: 4 products Known not affected: 180 products

https://access.redhat.com/errata/RHSA-2026:60386

Open the full advisory

RHSA-2026:60387

Vulnerability from csaf_redhat - Published: 2026-08-26 20:10 - Updated: 2026-11-13 16:44

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.11.11 security update

Severity

Important

Scope

55 vulnerabilities in this advisory, including CVE-2026-76827.

CVE-2026-76827

6.8 (Medium)


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

Fixed: 4 products Known not affected: 160 products

https://access.redhat.com/errata/RHSA-2026:60387

Open the full advisory

RHSA-2026:60388

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-11-13 16:44

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.14.4 security update

Severity

Important

Scope

60 vulnerabilities in this advisory, including CVE-2026-76827.

CVE-2026-76827

6.8 (Medium)


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

Fixed: 4 products Known not affected: 172 products

https://access.redhat.com/errata/RHSA-2026:60388

Open the full advisory

RHSA-2026:60389

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-11-13 14:59

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.15.6 security update

Severity

Important

Scope

40 vulnerabilities in this advisory, including CVE-2026-76827.

CVE-2026-76827

6.8 (Medium)


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

Fixed: 4 products Known not affected: 180 products

https://access.redhat.com/errata/RHSA-2026:60389

Open the full advisory

RHSA-2026:60390

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-11-13 14:59

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.13.11 security update

Severity

Important

Scope

56 vulnerabilities in this advisory, including CVE-2026-76827.

CVE-2026-76827

6.8 (Medium)


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

Fixed: 4 products Known not affected: 172 products

https://access.redhat.com/errata/RHSA-2026:60390

Open the full advisory

RHSA-2026:60391

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-11-13 14:59

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.16.4 security update

Severity

Important

Scope

41 vulnerabilities in this advisory, including CVE-2026-76827.

CVE-2026-76827

6.8 (Medium)


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

Fixed: 4 products Known not affected: 184 products

https://access.redhat.com/errata/RHSA-2026:60391

Open the full advisory

Workarounds

CNA · redhat

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
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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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CVE-2026-76827 (GCVE-0-2026-76827)

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