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

Q: How do I fix CVE-2026-5535?

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

Q: Is CVE-2026-5535 being exploited?

CVE-2026-5535 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-2026-5535 affect?

CVE-2026-5535 affects fedml. Severity is medium (CVSS 4.3). A security flaw has been discovered in FedML-AI FedML up to 0.8.9. This impacts an unknown function of the file FileUtils.java of the component MQTT Message Handler. Performing a manipulation of the argument dataSet results in path traversa

Q: How urgent is CVE-2026-5535?

Priority 31/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2026-5535 is a medium-severity flaw (CVSS 4.3) affecting fedml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security flaw has been discovered in FedML-AI FedML up to 0.8.9. This impacts an unknown function of the file FileUtils.java of the component MQTT Message Handler. Performing a manipulation of the argument dataSet results in path traversal. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-22
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 03:16 UTCPublished CVE record published
2026-07-24 20:10 UTCUpdated Record last modified

tensoropera fedml UPGRADE

Affected: < 0.8.9

Fixed in: 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 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-2026-5535?

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

Is CVE-2026-5535 being exploited?

CVE-2026-5535 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-2026-5535 affect?

CVE-2026-5535 affects fedml. Severity is medium (CVSS 4.3). A security flaw has been discovered in FedML-AI FedML up to 0.8.9. This impacts an unknown function of the file FileUtils.java of the component MQTT Message Handler. Performing a manipulation of the argument dataSet results in path traversa

How urgent is CVE-2026-5535?

Priority 31/100. Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2026-5536 HIGH 7.3 UPGRADE A weakness has been identified in FedML-AI FedML up to 0.8.9

References

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