CVE-2026-73197: A flaw was found in FreeIPA

Q: How do I fix CVE-2026-73197?

enterprise linux: mitigate or apply the listed mitigation; freeipa: upgrade to 4.13.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-73197 being exploited?

CVE-2026-73197 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-2026-73197 affect?

CVE-2026-73197 affects enterprise linux, freeipa. Severity is high (CVSS 7.5). A flaw was found in FreeIPA. A remote, unauthenticated attacker can exploit this vulnerability by sending oversized form POST requests to the `/ipa/migration/migration.py` endpoint. This can force the migration handler to read attacker-cont

Q: How urgent is CVE-2026-73197?

Priority 48/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTMITIGATEUPGRADE

CVE-2026-73197 is a high-severity flaw (CVSS 7.5) affecting enterprise linux, freeipa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in FreeIPA. A remote, unauthenticated attacker can exploit this vulnerability by sending oversized form POST requests to the `/ipa/migration/migration.py` endpoint. This can force the migration handler to read attacker-controlled request bodies fully into memory, leading to increased memory usage, slower request handling, and potential service disruption or denial of service.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-08-20
Last modified	2026-10-26

Publisher (CNA): Red Hat, Inc. · Vendor: freeipa · redhat

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-20 11:16 UTCPublished CVE record published
2026-10-26 14:16 UTCUpdated Record last modified

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0 · 8.0 · 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

freeipa freeipa UPGRADE

Affected: < 4.13.3

Fixed in: 4.13.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.13.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freeipa

Note

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

Advisories and coverage

Official advisories

Amazon Linux 2 ALAS: ALAS2-2026-3950 (important): ipa 2026-09-28

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-2026-73197?

enterprise linux: mitigate or apply the listed mitigation; freeipa: upgrade to 4.13.3. Exact commands for each OS are on this page.

Is CVE-2026-73197 being exploited?

CVE-2026-73197 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-2026-73197 affect?

CVE-2026-73197 affects enterprise linux, freeipa. Severity is high (CVSS 7.5). A flaw was found in FreeIPA. A remote, unauthenticated attacker can exploit this vulnerability by sending oversized form POST requests to the `/ipa/migration/migration.py` endpoint. This can force the migration handler to read attacker-cont

How urgent is CVE-2026-73197?

Priority 48/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

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References

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