CVE-2026-61709VulnerabilityPublished 23 Sep 2026Updated 30 Oct 2026

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Not known to be exploited · fixed in Red Hat package updates : update Red Hat when convenient.

Data as of 30 Oct 2026, 11:52 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.18.1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

No product-side mitigation is required while Zanzana remains disabled, which is the default setting. If Zanzana has been enabled, do not use ListUsers results for access control decisions; instead, use the Check API for each user and object. Upgrade to OpenFGA version 1.18.1 or later when available from Grafana vendors to obtain a fix. Refer to Red Hat Hardened Images RPM updates for Grafana 13.1.6-0.3.hum1 for the patched packages.

Description

A security flaw exists in OpenFGA's ListUsers API, which may incorrectly include users who should have been excluded by authorization rules involving exclusions and type-bound wildcards. This vulnerability affects the Zanzana authorization engine embedded in Grafana, which is included in certain Red Hat products. The vulnerable API is not the primary enforcement path in these products, and Zanzana is disabled by default. No product-side mitigation is required if Zanzana remains disabled. If enabled, users should avoid relying on ListUsers for access control decisions until a fixed OpenFGA version is available.

Impact

If the Zanzana authorization engine is enabled and applications use the vulnerable ListUsers API for access control, unauthorized users might be granted access to resources or sensitive information. However, since Zanzana is disabled by default and Grafana's main authorization path does not use ListUsers, the risk is limited in default Red Hat product deployments.

Summary

CVE-2026-61709 is a vulnerability in OpenFGA's ListUsers API where complex authorization rules combining exclusions and type-bound wildcards can cause the API to return users who should have been excluded. This flaw could lead to unauthorized access if applications rely on ListUsers for access control decisions. Red Hat bundles OpenFGA within Grafana's experimental Zanzana authorization engine, which is disabled by default. The primary authorization enforcement in Grafana uses different APIs (Check and ListObjects), so the vulnerable API is not used for enforcement in Red Hat products. The vulnerability is fixed in OpenFGA version 1.18.1. Red Hat Hardened Images RPMs include updated Grafana packages addressing this issue.

CWE-783Operator Precedence Logic Error (opens in a new tab)
Base weaknessLikelihood of exploit: Low
The product uses an expression in which operator precedence causes incorrect logic to be used.
Implementation
Regularly wrap sub-expressions in parentheses, especially in security-critical code.
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-178Improper Handling of Case Sensitivity (opens in a new tab)
Base weakness
The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.
Architecture and Design · Input Validation
Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Implementation · Input Validation
Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174).
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 30 Oct 2026, 09:51 UTC

WeaknessesCWE-783, CWE-178

Technical details

References

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