Low
OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation
Type: advisorySources: OSV
OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40264
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 20:26 UTC · Revision 1
Source evidence
OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation
core-osv · Original sourcePublished 21 Apr 2026, 00:47 UTC
OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.
osv:CVE-2026-40264
Complete source record
{
"id": "c464864f1998d5dbb169ea6e970bc720e178cb17e60a61c8343f11a953c6769b",
"url": "https://osv.dev/vulnerability/CVE-2026-40264",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation",
"summary": "OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.",
"evidence": "osv:CVE-2026-40264",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2026-40264",
"aliases": [
"BIT-openbao-2026-40264",
"CVE-2026-40264",
"GHSA-p49j-v9wc-wg57",
"GO-2026-5526"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/openbao/openbao",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "988c88d7ef54b4d4581629b229488dfba5e085ba"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.5.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.5.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v2.5.2",
"v2.5.1",
"v2.5.0",
"sdk/v2.5.1",
"api/v2.5.1",
"api/auth/userpass/v2.5.1",
"api/auth/ldap/v2.5.1",
"api/auth/kubernetes/v2.5.1",
"api/auth/jwt/v2.5.1",
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"dev-namespaces-base-20250424",
"dev-namespaces-base-20250311",
"v2.2.0-beta20250213",
"dev-namespaces-base-20250215",
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"api/auth/ldap/v2.2.0",
"api/auth/kubernetes/v2.2.0",
"api/auth/approle/v2.2.0",
"v2.1.0-beta20241114.3",
"v2.1.0-beta20241114.2",
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"api/auth/kubernetes/v2.0.1",
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"v2.0.0-beta20240618",
"sdk/v1.100.0-development20240408",
"api/v1.100.0-development20240408",
"api/auth/userpass/v1.1.0-development20240408",
"api/auth/ldap/v1.1.0-development20240408",
"api/auth/kubernetes/v1.1.0-development20240408",
"api/auth/gcp/v1.1.0-development20240408",
"api/auth/azure/v1.1.0-development20240408",
"api/auth/aws/v1.1.0-development20240408",
"api/auth/approle/v1.1.0-development20240408",
"v2.0.0-alpha20240329",
"before-plugin-removal",
"api/auth/userpass/v0.4.1",
"api/auth/gcp/v0.4.1",
"api/auth/azure/v0.4.1",
"api/auth/aws/v0.4.1",
"api/auth/approle/v0.4.1",
"sdk/v0.9.1",
"api/v1.9.2",
"api/v1.9.1",
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"api/auth/userpass/v0.4.0",
"api/auth/gcp/v0.4.0",
"api/auth/azure/v0.4.0",
"api/auth/aws/v0.4.0",
"api/auth/approle/v0.4.0",
"sdk/v0.8.0",
"api/v1.9.0",
"api/v1.8.3",
"sdk/v0.7.0",
"sdk/v0.6.2",
"sdk/v0.6.1",
"api/v1.8.2",
"api/v1.8.1",
"api/auth/userpass/v0.3.0",
"api/auth/gcp/v0.3.0",
"api/auth/azure/v0.3.0",
"api/auth/aws/v0.3.0",
"api/auth/approle/v0.3.0",
"api/v1.8.0",
"sdk/v0.6.0",
"api/auth/userpass/v0.2.0",
"api/auth/gcp/v0.2.0",
"api/auth/azure/v0.2.0",
"api/auth/aws/v0.2.0",
"api/auth/approle/v0.2.0",
"sdk/v0.5.3",
"api/v1.7.2",
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"api/v1.7.1",
"api/v1.7.0",
"api/v1.6.0",
"sdk/v0.5.0",
"api/v1.5.0",
"sdk/v0.4.1",
"api/v1.3.1",
"api/auth/approle/v0.1.1",
"api/auth/gcp/v0.1.0",
"api/auth/azure/v0.1.0",
"api/auth/userpass/v0.1.0",
"api/auth/aws/v0.1.0",
"api/auth/approle/v0.1.0",
"sdk/v0.3.0",
"api/v1.2.0",
"api/v1.1.1",
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"api/v1.0.3",
"sdk/v0.1.12",
"sdk/v0.1.11",
"sdk/v0.1.10",
"api/v1.0.2",
"sdk/v0.1.9",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40264.json"
}
}
],
"modified": "2026-10-28T02:30:39.046735159Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40264.json",
"https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57",
"https://nvd.nist.gov/vuln/detail/CVE-2026-40264"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1259"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40264.json"
}
},
"related_cves": [
{
"value": "CVE-2026-40264",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 506658,
"published_at": "2026-04-21T00:47:38.156+00:00"
}