CVE-2026-5536: A weakness has been identified in FedML-AI FedML up to 0.8.9

Q: How do I fix CVE-2026-5536?

fedml: upgrade to newer than 0.8.9. Exact commands for each OS are on this page.

Q: Is CVE-2026-5536 being exploited?

CVE-2026-5536 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-5536 affect?

CVE-2026-5536 affects fedml. Severity is high (CVSS 7.3). A weakness has been identified in FedML-AI FedML up to 0.8.9. Affected is the function sendMessage of the file grpc_server.py of the component gRPC server. Executing a manipulation can lead to deserialization. The attack may be performed fr

Q: How urgent is CVE-2026-5536?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.3REMOTEUPGRADE

CVE-2026-5536 is a high-severity flaw (CVSS 7.3) affecting fedml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A weakness has been identified in FedML-AI FedML up to 0.8.9. Affected is the function sendMessage of the file grpc_server.py of the component gRPC server. Executing a manipulation can lead to deserialization. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-20, CWE-502
Published	2026-04-05
Last modified	2026-07-24

Publisher (CNA): VulDB · Vendor: tensoropera

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-05 04:16 UTCPublished CVE record published
2026-07-24 20:10 UTCUpdated Record last modified

tensoropera fedml UPGRADE

Affected: <= 0.8.9

Fixed in: newer than 0.8.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fedml || rpm -q fedml || fedml --version

2. UPGRADE to newer than 0.8.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fedml

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fedml

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5536?

fedml: upgrade to newer than 0.8.9. Exact commands for each OS are on this page.

Is CVE-2026-5536 being exploited?

CVE-2026-5536 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5536 affect?

CVE-2026-5536 affects fedml. Severity is high (CVSS 7.3). A weakness has been identified in FedML-AI FedML up to 0.8.9. Affected is the function sendMessage of the file grpc_server.py of the component gRPC server. Executing a manipulation can lead to deserialization. The attack may be performed fr

How urgent is CVE-2026-5536?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-5535 MEDIUM 4.3 UPGRADE A security flaw has been discovered in FedML-AI FedML up to 0.8.9

References

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