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CVE-2026-73196

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

4.3 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.43%Up 0.2 points since Aug 21, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.3

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

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.

Record
CVE-2026-73196
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-770
Updated
2026-11-05
EUVDEUVD-2026-63241 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.

Record
EUVD-2026-63241
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-06
GitHub AdvisoriesGHSA-rvf3-5qrx-mrj3 4.3

A flaw was found in FreeIPA. A low-privilege authenticated user can exploit this vulnerability by...

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.

Record
GHSA-rvf3-5qrx-mrj3
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-770
Updated
2026-11-02
NVD 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.

Record
CVE-2026-73196
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-06
OSV 4.3

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

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.

Record
CVE-2026-73196
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-770
Updated
2026-11-06
OSVDEBIAN-CVE-2026-73196 6.5

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.

Record
DEBIAN-CVE-2026-73196
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-73196 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.

Record
UBUNTU-CVE-2026-73196
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
freeipa
Debian:12
 All versions, plus listed versions
4.10.1+dfsg1-1+exp14.10.1-1+exp14.10.2-14.10.2-24.10.2-2+exp1
Show 14 moreShow less
4.11.1-14.11.1-1+exp14.11.1-24.11.1-2+exp14.11.1-2.14.12.2-14.12.2-24.12.2-34.12.4-14.12.4-24.13.1-14.9.11-14.9.11-1+exp14.9.11-2
 None known
freeipa
Debian:13
 All versions, plus listed versions
4.12.4-14.12.4-24.13.1-1
 None known
freeipa
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
3.2.1-0ubuntu13.3.4-0ubuntu13.3.4-0ubuntu23.3.4-0ubuntu33.3.4-0ubuntu3.13.3.4-0ubuntu3.1+esm1
 None known
freeipa
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
4.1.4-14.3.1-0ubuntu14.3.1-0ubuntu1+esm1
 None known
freeipa
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.4.4-3ubuntu14.4.4-44.7.0~pre1+git20180411-2ubuntu14.7.0~pre1+git20180411-2ubuntu2
 None known
freeipa
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.8.1-2ubuntu14.8.3-14.8.6-1ubuntu2
 None known
freeipa
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.8.6-1ubuntu64.8.6-1ubuntu84.8.6-1ubuntu94.9.8-1
 None known
freeipa
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.10.2-14.10.2-24.10.2-2ubuntu34.11.1-14.11.1-2
 None known
freeipa
Ubuntu:26.10
 All versions, plus listed versions
4.13.1-14.13.1-1build1
 None known
freeipa
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.12.4-14.12.4-24.13.1-1
 None known

History

History
RecordedChangedSources
factsCVE List
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-73196 is a medium vulnerability (CVSS 4.3) in Freeipa, published August 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. No source names a fixed version.

References

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