CVE-2026-55689

highpriority · track · 32EPSS 0.004 · 35 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.41% (35th) EPSS

CVSS 8.1 · high

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.1

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 5.2

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 1.6 · impact 5.2

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV

v3.17.4highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USCWE-287US

affected products (4)

Products and version ranges known to be affected.

openfga openfga≤ < 1.18.0enisa_euvdEU
openfga helm charts< 0.3.9nvdUScpe:2.3:a:openfga:helm_charts:*:*:*:*:*:*:*:*
openfga openfga< 1.18.0nvdUScpe:2.3:a:openfga:openfga:*:*:*:*:*:*:*:*
Go github.com/openfga/openfga< 1.18.0osvUSpkg:golang/github.com/openfga/openfga

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-hcxc-wf8j-23hvOpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset2026-06-19ghsa · osvUS
## 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.
GO-2026-5423OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset in github.com/openfga/openfga2026-06-25vendor · osvUS
OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset in github.com/openfga/openfga

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2026-07-09modified 2026-07-14

references (16)

External citations — patches, advisories, analysis.

scry

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