Vulnerability-Lookup

GHSA-38W4-QXG9-XG36

Vulnerability from github – Published: 2026-07-30 15:31 – Updated: 2026-08-08 03:31

Details

Calico's apiserver wraps tier-scoped resources so that every operation runs through AuthorizeTierOperation, but the Delete override on NetworkPolicy, GlobalNetworkPolicy, and their staged variants is not invoked for DeleteCollection requests. A user holding the deletecollection verb or wildcard verbs on tier-scoped policy resources can bulk-delete policies in tiers they otherwise have no rights on, breaking the tier authorization boundary.

Severity

6.5 (Medium)


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

6.2 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:L/SA:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-41187"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-30T15:16:31Z",
    "severity": "MODERATE"
  },
  "details": "Calico\u0027s apiserver wraps tier-scoped resources so that every operation runs through AuthorizeTierOperation, but the Delete override on NetworkPolicy, GlobalNetworkPolicy, and their staged variants is not invoked for DeleteCollection requests. A user holding the deletecollection verb or wildcard verbs on tier-scoped policy resources can bulk-delete policies in tiers they otherwise have no rights on, breaking the tier authorization boundary.",
  "id": "GHSA-38w4-qxg9-xg36",
  "modified": "2026-08-08T03:31:11Z",
  "published": "2026-07-30T15:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41187"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12731"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12735"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12736"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12737"
    },
    {
      "type": "WEB",
      "url": "https://www.tigera.io/security-bulletins/tta-2026-006"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:L/SA:H/E:X/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-2026-41187 (GCVE-0-2026-41187)

Vulnerability from cvelistv5 – Published: 2026-07-30 14:45 – Updated: 2026-07-30 16:11

Title

Calico Tier Authorization Bypass via DeleteCollection

Summary

Severity

6.2 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:L/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-30 16:11 UTC

CWE

CWE-285 - Improper Authorization
CWE-863 - Incorrect Authorization

Assigner

Tigera

References

5 references

URL	Tags
https://github.com/projectcalico/calico/pull/12731	patch
https://github.com/projectcalico/calico/pull/12735	patch
https://github.com/projectcalico/calico/pull/12736	patch
https://github.com/projectcalico/calico/pull/12737	patch
https://www.tigera.io/security-bulletins/tta-2026-006/	vendor-advisory

Impacted products

3 products

Vendor	Product	Version
Tigera	Calico	Affected: 0 , < 3.31.6 (semver) Affected: 3.32.0 , < 3.32.1 (semver)
Tigera	Calico Enterprise	Affected: 0 , < 3.21.7 (semver) Affected: 3.22.0 , < 3.22.5 (semver)
Tigera	Calico Cloud	Affected: 0 , < 22.4.0 (semver)

Date Public

2026-07-30 16:00

Credits

Behnam Shobiri Mazdak Nasab Anthony Tam Matt Dupre

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JSON

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          "url": "https://www.tigera.io/security-bulletins/tta-2026-006/"
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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.

Action not permitted

GHSA-38W4-QXG9-XG36

CVE-2026-41187 (GCVE-0-2026-41187)

Tags

Sightings

Nomenclature