CVE-2026-73196: Ipa: freeipa: authenticated dos in `otptoken-add` via unbounded otp key decoding/re-encoding

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-20 · updated 2026-10-27
Weakness: CWE-770

Description

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.

Affected products

FreeIPA ipa: before 4.13.3 — fixed in 4.13.3
Red Hat Enterprise Linux: 6.0, 7.0, 8.0, 9.0, 10.0

How to fix

Upgrade to a fixed version: FreeIPA ipa 4.13.3. Check the vendor advisory for mitigations.

References

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