CVE-2026-55170

openfga · Vulnerability

CVSS 4.0 2.1 LOWEUVD CVSS 4.0 2.1 CVSS 4.0 · [email protected] · Secondary 2.1 LOWCVSS 3.1 · [email protected] · Primary 5.4 MEDIUMCVSS_V3 CVSS_V4 Publisher rating LOWFixed by github.com/openfga/openfga 1.18.0osv · severity unknownFixed by github.com/openfga/openfga 1.18.0KEV status unknown

Original advisory

cve-program · CVE-2026-55170

Published

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as user:Alice and user:alice as equivalent, causing two distinct check requests to return the same response. This issue is fixed in 1.18.0.

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euvd · EUVD-2026-42705

Published

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nvd · CVE-2026-55170

Published

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osv · GHSA-cf98-j28v-49v6

Published

## Description In OpenFGA, when MySQL is being used as the datastore, two distinct check requests can return the same response. ## Preconditions This applies if the following preconditions are met: 1. You run OpenFGA with MySQL as the datastore 2. Your authorization decisions rely on case-sensitive user strings. ## Fix Upgrade to OpenFGA 1.18.0 or greater. ## Acknowledgements OpenFGA would like to thank @sahajamoth for the detailed report.

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osv · GO-2026-5322

Published

OpenFGA Improper Policy Enforcement in github.com/openfga/openfga

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Affected versions, risk and source history

Exploitation and risk

Source status

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

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cve-program · CVE-2026-55170

Published

OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions

Source published: 9 Jul 2026 21:04:28 UTC
Source modified: 10 Jul 2026 14:26:15 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 2.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

euvd · EUVD-2026-42705

Published

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model id…

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 9, 2026, 9:04:28 PM

dateUpdated: Jul 10, 2026, 2:26:15 PM

Source published: Jul 9, 2026, 9:04:28 PM (timezone not stated)
Source modified: Jul 10, 2026, 2:26:15 PM (timezone not stated)
Saved here: 13 Nov 2026 15:03:10 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 4.0 · 2.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

nvd · CVE-2026-55170

Published

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model id…

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-178

Original publisher date fields

published: 2026-07-09T22:17:05.937

lastModified: 2026-07-14T01:22:35.620

2 source CPE criteria · context only

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

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 9 Jul 2026 22:17:05 UTC
Source modified: 14 Jul 2026 01:22:35 UTC
Saved here: 25 Oct 2026 13:17:34 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 2.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Primary · 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

osv · GHSA-cf98-j28v-49v6

Published

OpenFGA Improper Policy Enforcement

Source published: 18 Jun 2026 15:05:30 UTC
Source modified: 10 Sep 2026 03:51:08 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

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

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Publisher rating · LOW

osv · GO-2026-5322

Published

OpenFGA Improper Policy Enforcement in github.com/openfga/openfga

Source published: 25 Jun 2026 18:43:19 UTC
Source modified: 25 Jun 2026 19:45:28 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.