Medium
OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset
Type: advisorySources: OSV
OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, OpenFGA's OIDC authenticator skipped JWT audience validation when authn.method was set to oidc, authn.oidc.issuer was configured, and authn.oidc.audience was not set, allowing a token minted for an unrelated service by the same identity provider to authenticate to OpenFGA. This issue is fixed in 1.18.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-55689
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 09:12 UTC · Revision 1
Source evidence
OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset
core-osv · Original sourcePublished 9 Jul 2026, 21:06 UTC
OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, OpenFGA's OIDC authenticator skipped JWT audience validation when authn.method was set to oidc, authn.oidc.issuer was configured, and authn.oidc.audience was not set, allowing a token minted for an unrelated service by the same identity provider to authenticate to OpenFGA. This issue is fixed in 1.18.0.
osv:CVE-2026-55689
Complete source record
{
"id": "a59524c3372b2ae356c7d2b3fab0933a2cc3c7e03651c3cebc0e20b22bb4a421",
"url": "https://osv.dev/vulnerability/CVE-2026-55689",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset",
"summary": "OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, OpenFGA's OIDC authenticator skipped JWT audience validation when authn.method was set to oidc, authn.oidc.issuer was configured, and authn.oidc.audience was not set, allowing a token minted for an unrelated service by the same identity provider to authenticate to OpenFGA. This issue is fixed in 1.18.0.",
"evidence": "osv:CVE-2026-55689",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-55689",
"aliases": [
"CVE-2026-55689",
"GHSA-hcxc-wf8j-23hv",
"GO-2026-5423"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"
}
],
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"modified": "2026-10-28T02:30:47.278795190Z",
"provider": "osv",
"references": [
"https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9",
"https://github.com/openfga/openfga/releases/tag/v1.18.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55689.json",
"https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv",
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"https://github.com/openfga/helm-ch"
],
"provider_metadata": {
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55689.json"
}
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{
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"evidence": "/id"
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"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 515058,
"published_at": "2026-07-09T21:06:22.543+00:00"
}