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Vulnerability · Published Aug 20, 2026 · Assigned by redhat

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

Medium 4.3

In plain English

A medium-severity resource allocation without limits in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.4%top 62.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12freeipano fix listedDEBIAN-CVE-2026-73196
Debian:13freeipano fix listedDEBIAN-CVE-2026-73196
Ubuntu:22.04:LTSfreeipano fix listedUBUNTU-CVE-2026-73196
Ubuntu:24.04:LTSfreeipano fix listedUBUNTU-CVE-2026-73196
Ubuntu:26.04:LTSfreeipano fix listedUBUNTU-CVE-2026-73196
Ubuntu:26.10freeipano fix listedUBUNTU-CVE-2026-73196

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References