High
Auth Proxy IPv6 whitelist bypass
Type: advisorySources: OSV
When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML, LDAP, etc are unaffected here.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33376
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 18:24 UTC · Revision 1
Source evidence
When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML, LDAP, etc are unaffected here.
osv:CVE-2026-33376
Complete source record
{
"id": "33632e9af9072232c4c8fdc65f5d870911a42c9b0d8a8106a4a4346a95a032c1",
"url": "https://osv.dev/vulnerability/CVE-2026-33376",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Auth Proxy IPv6 whitelist bypass",
"summary": "When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML, LDAP, etc are unaffected here.",
"evidence": "osv:CVE-2026-33376",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-33376",
"aliases": [
"BIT-grafana-2026-33376",
"CVE-2026-33376"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/grafana/grafana",
"type": "GIT",
"events": [
{
"introduced": "6134e3cf35a99c7dd3041b7ececb47cb7619ba9a"
},
{
"fixed": "4da40799451631e6c8591c841282447cdf55be3d"
},
{
"introduced": "92f1fba9b4b6700328e99e97328d6639df8ddc3d"
},
{
"fixed": "576f2e81b33bc857df779c95cb38effaa6c58b03"
},
{
"introduced": "20051fb1fc604fc54aae76356da1c14612af41d0"
},
{
"fixed": "3b85eb0d9490f36d682e4fe55684f7da7b8b99b6"
},
{
"introduced": "d1729c53a7f44e2e58947eb44eb896c2fb1c30b3"
},
{
"fixed": "86c83248f8739fbc178c0e5c451b44bdba7b5ed7"
},
{
"introduced": "4da40799451631e6c8591c841282447cdf55be3d"
},
{
"last_affected": "a100054f212653d1f15ae4fc80e98c9548c77f86"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "8.5.0"
},
{
"fixed": "11.6.14"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "12.2.0"
},
{
"fixed": "12.2.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "12.3.0"
},
{
"fixed": "12.3.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "12.4.0"
},
{
"fixed": "12.4.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:11.6.14:-:*:*:*:*:*:*",
"range": [
{
"introduced": "11.6.14-NA"
},
{
"last_affected": "11.6.14-NA"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:11.6.14:security01:*:*:*:*:*:*",
"range": [
{
"introduced": "11.6.14-security01"
},
{
"last_affected": "11.6.14-security01"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:12.2.8:-:*:*:*:*:*:*",
"range": [
{
"introduced": "12.2.8-NA"
},
{
"last_affected": "12.2.8-NA"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:12.2.8:security01:*:*:*:*:*:*",
"range": [
{
"introduced": "12.2.8-security01"
},
{
"last_affected": "12.2.8-security01"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:12.3.6:-:*:*:*:*:*:*",
"range": [
{
"introduced": "12.3.6-NA"
},
{
"last_affected": "12.3.6-NA"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:12.3.6:security01:*:*:*:*:*:*",
"range": [
{
"introduced": "12.3.6-security01"
},
{
"last_affected": "12.3.6-security01"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:12.4.3:-:*:*:*:*:*:*",
"range": [
{
"introduced": "12.4.3-NA"
},
{
"last_affected": "12.4.3-NA"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:13.0.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "13.0.0"
},
{
"last_affected": "13.0.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:grafana:grafana:13.0.1:-:*:*:*:*:*:*",
"range": [
{
"introduced": "13.0.1-NA"
},
{
"last_affected": "13.0.1-NA"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"11.6.14-NA",
"11.6.14-security01",
"12.2.8-NA",
"12.2.8-security01",
"12.3.6-NA",
"12.3.6-security01",
"12.4.3-NA",
"13.0.0",
"13.0.1-NA"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33376.json"
}
}
],
"modified": "2026-10-28T02:30:21.998462723Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33376.json",
"https://grafana.com/security/security-advisories/cve-2026-33376",
"https://nvd.nist.gov/vuln/detail/CVE-2026-33376"
],
"provider_metadata": {
"cna_assigner": "GRAFANA",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "9.4.0"
},
{
"last_affected": "11.6.14"
},
{
"introduced": "11.6.14"
},
{
"fixed": "11.6.14+security-04"
},
{
"introduced": "12.0.0"
},
{
"last_affected": "12.2.8"
},
{
"introduced": "12.2.8"
},
{
"fixed": "12.2.8+security-04"
},
{
"introduced": "12.3.0"
},
{
"last_affected": "12.3.6"
},
{
"introduced": "12.3.6"
},
{
"fixed": "12.3.6+security-04"
},
{
"introduced": "12.4.0"
},
{
"last_affected": "12.4.3"
},
{
"introduced": "12.4.3"
},
{
"fixed": "12.4.3+security-02"
},
{
"introduced": "13.0.0"
},
{
"last_affected": "13.0.1"
},
{
"introduced": "13.0.1"
},
{
"fixed": "13.0.1+security-01"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33376.json"
}
},
"related_cves": [
{
"value": "CVE-2026-33376",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 488314,
"published_at": "2026-05-13T19:28:34.473+00:00"
}