Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-08-19 20:56 – Updated: 2026-08-21 16:49

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 redhat root

References

2 references

URL	Tags
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

1 product

Vendor	Product	Version	CPE status
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2

Date Public

2026-08-19 20:02

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-76827

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

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/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://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-search-indexer-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
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    }
  ],
  "id": "CVE-2026-76827",
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GHSA-4VRW-8FX2-PJ82

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

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": {
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      "CWE-693"
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  },
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  "id": "GHSA-4vrw-8fx2-pj82",
  "modified": "2026-08-19T21:30:38Z",
  "published": "2026-08-19T21:30:38Z",
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      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

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

FKIE_CVE-2026-76827

GHSA-4VRW-8FX2-PJ82

Tags

Sightings

Nomenclature