Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-04-21 12:15

Modified

2026-09-10 15:46

Summary

Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header

Details

If a Vault auth mount is configured to pass through the "Authorization" header, and the "Authorization" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "vault",
        "purl": "pkg:bitnami/vault"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.10.0"
            },
            {
              "fixed": "2.0.0"
            }
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          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4525"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:hashicorp:vault:*:*:*:*:*:go:*:*",
      "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:go:*:*",
      "cpe:2.3:a:hashicorp:vault:*:*:*:*:community:go:*:*"
    ],
    "severity": "High"
  },
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  "id": "BIT-vault-2026-4525",
  "modified": "2026-09-10T15:46:03.895Z",
  "published": "2026-04-21T12:15:54.610Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4525"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-4525"
    },
    {
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459107"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header"
}

CVE-2026-4525 (GCVE-0-2026-4525)

Vulnerability from cvelistv5 – Published: 2026-04-17 03:00 – Updated: 2026-07-15 00:52

Title

Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-17 13:19 UTC

CWE

CWE-201 - Insertion of Sensitive Information Into Sent Data

Assigner

HashiCorp mitre root

References

4 references

URL	Tags
https://discuss.hashicorp.com/t/hcsec-2026-07-vau…
https://access.redhat.com/security/cve/CVE-2026-4525	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2459107	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

4 products

Vendor	Product	Version
HashiCorp	Vault	Affected: 0.11.2 , < 2.0.0 (semver)
HashiCorp	Vault Enterprise	Affected: 0.11.2 , < 2.0.0 (semver)
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat Openshift Data Foundation 4	cpe:/a:redhat:openshift_data_foundation:4

Credits

This issue was identified and reported by Oleh Konko of 1seal.

Show details on NVD website

JSON

To clipboard

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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