EUVD-2026-42710Published

OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset

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cve-program · CVE-2026-55689

Published

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.

Source published: 9 Jul 2026 21:06:22 UTC
Source modified: 10 Jul 2026 13:45:39 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 6.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

euvd · EUVD-2026-42710

Published

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datePublished: Jul 9, 2026, 9:06:22 PM

dateUpdated: Jul 10, 2026, 1:45:39 PM

Source published: Jul 9, 2026, 9:06:22 PM (timezone not stated)
Source modified: Jul 10, 2026, 1:45:39 PM (timezone not stated)
Saved here: 14 Nov 2026 07:08:10 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 6.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

nvd · CVE-2026-55689

Published

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Source analysis status: Analyzed

Weakness classifications: CWE-287

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published: 2026-07-09T22:17:06.553

lastModified: 2026-07-14T01:28:44.147

2 source CPE criteria · context only

cpe:2.3:a:openfga:helm_charts:*:*:*:*:*:openfga:*:*
cpe:2.3:a:openfga:openfga:*:*:*:*:*:*:*:*

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Source published: 9 Jul 2026 22:17:06 UTC
Source modified: 14 Jul 2026 01:28:44 UTC
Saved here: 25 Oct 2026 14:19:05 UTC
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CVSS 3.1 · [email protected] · Secondary · 6.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS 3.1 · [email protected] · Primary · 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

osv · GHSA-hcxc-wf8j-23hv

Published

## Description OpenFGA's OIDC authenticator skipped JWT audience (`aud`) validation when no audience was configured. In deployments where one identity provider issues tokens for multiple services, a token minted for an unrelated service could authenticate to OpenFGA. ## Preconditions This applies if the following preconditions are met: 1. You run OpenFGA with `authn.method` set to `oidc`. 2. You configured `authn.oidc.issuer` but did **not** set `authn.oidc.audience` (`--authn-oidc-audience` / `OPENFGA_AUTHN_OIDC_AUDIENCE`). ## Fix Upgrade to OpenFGA 1.18.0 or greater. OpenFGA now refuses to start in `oidc` mode unless both `authn.oidc.issuer` and `authn.oidc.audience` are set, and the `aud` claim is always validated. ## Acknowledgements OpenFGA would like to thank https://github.com/0xVijay for the report.

Source published: 19 Jun 2026 14:35:35 UTC
Source modified: 10 Sep 2026 03:50:49 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Publisher rating · MODERATE

osv · GO-2026-5423

Published

OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset in github.com/openfga/openfga

Source published: 25 Jun 2026 22:34:31 UTC
Source modified: 25 Jun 2026 23:01:12 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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