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

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

发现 FreeIPA 中存在一个漏洞。具有低权限的认证用户可通过提交过长的单次使用密码（OTP）密钥值来利用此漏洞。该过长的密钥在被解码并重新编码时未进行适当的长度限制，从而消耗大量 CPU 和内存资源。这可能导致拒绝服务（DoS）攻击，降低 IPA 服务的可用性。

CVSS 4.3 · Medium EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-73196

Vulnerability Information
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Vulnerability Title
Ipa: freeipa: authenticated dos in `otptoken-add` via unbounded otp key decoding/re-encoding
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-73196

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III. Intelligence Information for CVE-2026-73196

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Vendor Advisories for CVE-2026-73196 (2)

Same Patch Batch · Red Hat · 2026-08-20 · 16 CVEs total

CVE-2026-67567 9.9 CRITICAL Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart ap
CVE-2026-66788 9.9 CRITICAL Lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled labels
CVE-2026-66785 9.9 CRITICAL Submariner: submariner: unvalidated endpoint.spec.subnets propagated into wireguard allowe
CVE-2026-11861 9.6 CRITICAL Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relations
CVE-2026-13097 9.1 CRITICAL Ipa: privilege escalation via krbcanonicalname manipulation due to realm-unaware uniquenes
CVE-2026-66787 8.7 HIGH Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice and servi
CVE-2026-77176 8.1 HIGH Kata-containers: insufficient validation of createcontainer mount and storage rules in gen
CVE-2026-18917 7.8 HIGH Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
CVE-2026-19582 7.8 HIGH Binutils: stack buffer overflow in gnu binutils in rsrc_print_name from an untrusted pe fi
CVE-2026-73137 7.7 HIGH Multicloud-operators-subscription: multicloud-operators-subscription: cross-namespace secr
CVE-2026-73198 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/i18n_messages` via unbounded request body read
CVE-2026-73197 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/migration/migration.py` via unbounded request b
CVE-2026-19611 7.4 HIGH Wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: pass
CVE-2026-73199 6.5 MEDIUM Ipa: freeipa: null pointer dereference in `ipa-enrollment` extended operation (`join_oid`)
CVE-2026-77014 5.3 MEDIUM Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-770

V. Comments for CVE-2026-73196

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