Vulnerability-Lookup

CVE-2026-48032 (GCVE-0-2026-48032)

Vulnerability from cvelistv5 – Published: 2026-07-24 18:39 – Updated: 2026-07-24 18:39

Title

Hulumi: IAM-role policy checks bypassed when the role trusts multiple OIDC providers

Summary

Hulumi is an open-source toolkit that ships secure-by-default cloud and platform infrastructure components for Pulumi. Prior to version 1.4.0, IAM-role policy checks can be bypassed when the role trusts multiple OIDC providers. This issue has been patched in version 1.4.0.

Severity

8.3 (High)


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

CWE

CWE-697 - Incorrect Comparison

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/kerberosmansour/hulumi/securit…	x_refsource_CONFIRM
https://github.com/kerberosmansour/hulumi/pull/178	x_refsource_MISC
https://github.com/kerberosmansour/hulumi/release…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
kerberosmansour	hulumi	Affected: < 1.4.0

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "hulumi",
          "vendor": "kerberosmansour",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.4.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Hulumi is an open-source toolkit that ships secure-by-default cloud and platform infrastructure components for Pulumi. Prior to version 1.4.0, IAM-role policy checks can be bypassed when the role trusts multiple OIDC providers. This issue has been patched in version 1.4.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-697",
              "description": "CWE-697: Incorrect Comparison",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-24T18:39:05.061Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/kerberosmansour/hulumi/security/advisories/GHSA-g759-4pxw-6692",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/kerberosmansour/hulumi/security/advisories/GHSA-g759-4pxw-6692"
        },
        {
          "name": "https://github.com/kerberosmansour/hulumi/pull/178",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kerberosmansour/hulumi/pull/178"
        },
        {
          "name": "https://github.com/kerberosmansour/hulumi/releases/tag/v1.4.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kerberosmansour/hulumi/releases/tag/v1.4.0"
        }
      ],
      "source": {
        "advisory": "GHSA-g759-4pxw-6692",
        "discovery": "UNKNOWN"
      },
      "title": "Hulumi: IAM-role policy checks bypassed when the role trusts multiple OIDC providers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48032",
    "datePublished": "2026-07-24T18:39:05.061Z",
    "dateReserved": "2026-05-20T18:15:53.577Z",
    "dateUpdated": "2026-07-24T18:39:05.061Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-48032",
      "date": "2026-07-25",
      "epss": "0.00309",
      "percentile": "0.23224"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-48032\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-24T19:16:58.190\",\"lastModified\":\"2026-07-24T19:16:58.190\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Hulumi is an open-source toolkit that ships secure-by-default cloud and platform infrastructure components for Pulumi. Prior to version 1.4.0, IAM-role policy checks can be bypassed when the role trusts multiple OIDC providers. This issue has been patched in version 1.4.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"kerberosmansour\",\"product\":\"hulumi\",\"versions\":[{\"version\":\"\u003c 1.4.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/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\",\"baseScore\":8.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-697\"}]}],\"references\":[{\"url\":\"https://github.com/kerberosmansour/hulumi/pull/178\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/kerberosmansour/hulumi/releases/tag/v1.4.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/kerberosmansour/hulumi/security/advisories/GHSA-g759-4pxw-6692\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}

GHSA-G759-4PXW-6692

Vulnerability from github – Published: 2026-06-10 13:37 – Updated: 2026-06-10 13:37

Summary

@hulumi/policies bypasses IAM-role policy checks when the role trusts multiple OIDC providers

Details

Affected: @hulumi/policies < 1.4.0 — Fixed in: 1.4.0 — Severity: High — CWE-697 (Incorrect Comparison)

Summary

AWS IAM trust policies can list more than one federated identity provider — for example, a role that accepts BOTH GitHub Actions OIDC and Google's OIDC. The G_OIDC_1 and G_OIDC_2 policy rules are supposed to flag IAM roles whose GitHub-OIDC trust is too permissive (e.g. wildcard sub: conditions that would let any branch or any pull request assume the role).

The bug: when the role's Principal.Federated field was a JSON array of multiple providers, the rules failed to recognise that GitHub Actions was one of them. The providers list was coerced into a single comma-joined string, the matcher only looked at the start, and the GitHub OIDC hostname was lost in the join. Both rules concluded "this isn't a GitHub-OIDC role" and skipped the wildcard check.

Impact

A trust policy that listed the real GitHub OIDC provider ARN alongside any second provider would slip past both detectors. Consumers using HulumiHardeningPack or HulumiGithubHardeningPack could ship an IAM role with wildcard sub: conditions (allowing untrusted PRs from forks to assume the role) while their policy validation reported the stack as compliant. The G_OIDC_2 detector also failed to mark such roles for the cluster-admin / AdministratorAccess blast-radius check.

Patches

Upgrade to @hulumi/policies@1.4.0. The shared GitHub-OIDC-provider matcher now correctly walks lists of providers — if any element of the list is the real GitHub OIDC ARN, the role is treated as GitHub-OIDC-assumable and the wildcard / blast-radius checks apply.

Workarounds

None reliable — upgrade is the fix.

Resources

PR #178 (Cluster A); regression tests at packages/policies/tests/github/{g-oidc-2,github-oidc-issuer}.test.ts.

Severity

8.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@hulumi/policies"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48032"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-697"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-10T13:37:08Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "**Affected:** `@hulumi/policies` `\u003c 1.4.0` \u2014 **Fixed in:** `1.4.0` \u2014 **Severity:** High \u2014 **CWE-697 (Incorrect Comparison)**\n\n#### Summary\n\nAWS IAM trust policies can list more than one federated identity provider \u2014 for example, a role that accepts BOTH GitHub Actions OIDC and Google\u0027s OIDC. The `G_OIDC_1` and `G_OIDC_2` policy rules are supposed to flag IAM roles whose GitHub-OIDC trust is too permissive (e.g. wildcard `sub:` conditions that would let any branch or any pull request assume the role).\n\nThe bug: when the role\u0027s `Principal.Federated` field was a JSON array of multiple providers, the rules failed to recognise that GitHub Actions was one of them. The providers list was coerced into a single comma-joined string, the matcher only looked at the start, and the GitHub OIDC hostname was lost in the join. Both rules concluded \"this isn\u0027t a GitHub-OIDC role\" and skipped the wildcard check.\n\n#### Impact\n\nA trust policy that listed the real GitHub OIDC provider ARN alongside any second provider would slip past both detectors. Consumers using `HulumiHardeningPack` or `HulumiGithubHardeningPack` could ship an IAM role with wildcard `sub:` conditions (allowing untrusted PRs from forks to assume the role) while their policy validation reported the stack as compliant. The G_OIDC_2 detector also failed to mark such roles for the cluster-admin / `AdministratorAccess` blast-radius check.\n\n#### Patches\n\nUpgrade to `@hulumi/policies@1.4.0`. The shared GitHub-OIDC-provider matcher now correctly walks lists of providers \u2014 if any element of the list is the real GitHub OIDC ARN, the role is treated as GitHub-OIDC-assumable and the wildcard / blast-radius checks apply.\n\n#### Workarounds\n\nNone reliable \u2014 upgrade is the fix.\n\n#### Resources\n\n- [PR #178](https://github.com/kerberosmansour/hulumi/pull/178) (Cluster A); regression tests at `packages/policies/tests/github/{g-oidc-2,github-oidc-issuer}.test.ts`.",
  "id": "GHSA-g759-4pxw-6692",
  "modified": "2026-06-10T13:37:08Z",
  "published": "2026-06-10T13:37:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kerberosmansour/hulumi/security/advisories/GHSA-g759-4pxw-6692"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kerberosmansour/hulumi/pull/178"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kerberosmansour/hulumi"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "@hulumi/policies bypasses IAM-role policy checks when the role trusts multiple OIDC providers"
}

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.

Action not permitted

CVE-2026-48032 (GCVE-0-2026-48032)

GHSA-G759-4PXW-6692

Summary

Impact

Patches

Workarounds

Resources

Tags

Sightings

Nomenclature