Is CVE-2026-55170 in the CISA KEV catalog?

No. CVE-2026-55170 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-55170?

CVE-2026-55170 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2026-55170?

CVE-2026-55170 has an EPSS score of 0.25% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-55170?

Upgrade helm charts to 0.3.9 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-55170

MEDIUM

5.4

CVSS v3

NVD

Description

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.

CWE-178

How to fix

Remediation Available

helm chartsNVD

Affected:< 0.3.9Fixed in:0.3.9CVE-2026-55170derived from NVD

openfgaNVD

Affected:< 1.18.0Fixed in:1.18.0CVE-2026-55170derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.25%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Patch2

Vendor Advisory1

github.com

Release Notes2

Related Vulnerabilities

Other CWE-178 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-27636	Medium	5.6	80%	-	Fix
CVE-2021-24347	High	8.8	52%	-	Fix
CVE-2020-12812	Critical	9.8	49%	KEV + Ransom	Fix
CVE-2003-0411	High	7.5	25%	-	-
CVE-2018-9845	Critical	9.8	13%	-	Fix
CVE-2001-0766	Critical	9.8	8.2%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-14.