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FederatedAI FATE CVE-2026-14621

| EUVDEUVD-2026-41660 LOW
Exposure of Data Element to Wrong Session (CWE-488)
2026-07-04 VulDB GHSA-pqmh-9h5r-56pf
Java Information Disclosure Fate
1.3
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
1.3 LOW
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
vuln.today AI
3.1 LOW

Network-reachable gRPC endpoint requires authenticated federated party (PR:L); high complexity to forge valid cross-session identifiers; only limited confidentiality exposure, no integrity or availability impact.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
CVSS changed
Jul 04, 2026 - 09:22 NVD
2.3 (LOW) 1.3 (LOW)
Analysis Generated
Jul 04, 2026 - 09:01 vuln.today

DescriptionCVE.org

A vulnerability has been found in FederatedAI FATE up to 2.2.0. This affects the function QueuePushReqStreamObserver.initEggroll of the file java/osx/osx-broker/src/main/java/org/fedai/osx/broker/grpc/QueuePushReqStreamObserver.java of the component OSX Broker. Such manipulation of the argument rollSiteSessionId/dstRole/dstPartyId leads to exposure of data element to wrong session. The attack can be executed remotely. A high complexity level is associated with this attack. It is indicated that the exploitability is difficult. The exploit has been disclosed to the public and may be used. The pull request to fix this issue awaits acceptance.

AnalysisAI

Session data exposure in FederatedAI FATE's OSX Broker gRPC component allows an authenticated federated party to manipulate session routing arguments and access data belonging to a different federated session. Affected versions extend through FATE 2.2.0, specifically in the QueuePushReqStreamObserver.initEggroll method within the Java-based OSX Broker. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain federated party credentials
Delivery
Connect to OSX Broker gRPC endpoint
Exploit
Craft request with forged rollSiteSessionId/dstRole/dstPartyId
Execution
Trigger session misrouting in QueuePushReqStreamObserver.initEggroll
Impact
Receive data from victim party's session
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to hold low-privilege credentials as an authenticated participant in the FATE federated learning network - this is not unauthenticated access. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 2.3 (vector: AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P) accurately reflects a low-priority vulnerability in most environments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated member of a FATE federated learning network - such as a rogue or compromised federated party - crafts a malicious gRPC streaming request to the OSX Broker with manipulated rollSiteSessionId, dstRole, and dstPartyId arguments that reference a session belonging to a different legitimate participant. Because the broker fails to validate session ownership, it routes data from the targeted session back to the attacker's request context, allowing partial disclosure of that party's in-flight model data or session metadata. …
Remediation The upstream fix is available as GitHub Pull Request #5792 (https://github.com/FederatedAI/FATE/pull/5792), but at time of analysis this PR had not yet been accepted and merged, meaning no officially released patched version has been independently confirmed. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-14621 vulnerability details – vuln.today
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