CVE-2025-43863: vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Fe

Q: How do I fix CVE-2025-43863?

vantage6: upgrade to 4.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-43863 being exploited?

CVE-2025-43863 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-2025-43863 affect?

CVE-2025-43863 affects vantage6. Severity is critical (CVSS 9.8). vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. If attacker gets access to an authenticated session, they can try to brute-force the

Q: How urgent is CVE-2025-43863?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-43863 is a critical-severity flaw (CVSS 9.8) affecting vantage6. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. If attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct. This vulnerability is fixed in 4.11.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-307
Published	2025-06-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: vantage6

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-12 18:15 UTCPublished CVE record published
2026-06-17 09:24 UTCUpdated Record last modified

vantage6 vantage6 UPGRADE

Affected: < 4.11.0

Fixed in: 4.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vantage6 || rpm -q vantage6 || vantage6 --version

2. UPGRADE to 4.11.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vantage6

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vantage6

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-2025-43863?

vantage6: upgrade to 4.11.0. Exact commands for each OS are on this page.

Is CVE-2025-43863 being exploited?

CVE-2025-43863 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-2025-43863 affect?

CVE-2025-43863 affects vantage6. Severity is critical (CVSS 9.8). vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. If attacker gets access to an authenticated session, they can try to brute-force the

How urgent is CVE-2025-43863?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-43866 HIGH 7.5 UPGRADE vantage6 is an open-source infrastructure for privacy preserving analysis

References

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