CVE-2026-73196
Fixed in a distro release EPSS <1%CVSS 4.3
A flaw was found in FreeIPA. A low-privilege authenticated user can exploit this vulnerability by submitting an oversized One-Time Password (OTP) key value. This oversized key is then decoded and re-encoded without proper size limits, consuming excessive CPU and memory resources. This can lead to a denial of service, degrading the availability of the IPA service.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux 2 | ipa-client | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-client-common | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-common | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-python-compat | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-server | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-server-common | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-server-dns | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | ipa-server-trust-ad | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | python2-ipaclient | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | python2-ipalib | 4.6.8-5.amzn2.17.10 |
| Amazon Linux 2 | python2-ipaserver | 4.6.8-5.amzn2.17.10 |
| Chainguard | freeipa | 4.13.3-r0 |
| Chainguard | freeipa-doc | 4.13.3-r0 |
| Chainguard | py3.13-ipaclient | 4.13.3-r0 |
| Chainguard | py3.13-ipalib | 4.13.3-r0 |
| Chainguard | py3.13-ipaplatform | 4.13.3-r0 |
| Chainguard | py3.13-ipapython | 4.13.3-r0 |
| Chainguard | py3.13-ipaserver | 4.13.3-r0 |
| Chainguard | py3.13-ipatests | 4.13.3-r0 |
| Debian 12 | freeipa | no fix |
| Debian 13 | freeipa | no fix |
| Ubuntu 18.04 LTS | freeipa | no fix |
| Ubuntu 20.04 LTS | freeipa | no fix |
| Ubuntu 22.04 LTS | freeipa | no fix |
| Ubuntu 24.04 LTS | freeipa | no fix |
| Ubuntu 26.04 LTS | freeipa | no fix |
| Ubuntu 26.10 | freeipa | no fix |
| Ubuntu Pro 14.04 LTS | freeipa | no fix |
| Ubuntu Pro 16.04 LTS | freeipa | no fix |