CVE-2026-14612
MediumCVSS 4.2Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may be able to trigger ipa-otpd to write or read one byte past the end of a fixed-size buffer.
Risk Assessment
The risk for the organization includes limited denial of service (DoS) affecting the ipa-otpd daemon, potentially disrupting OAuth2 authentication services in the FreeIPA environment. Exploitation requires FreeIPA to be configured with an external IdP and a user to initiate the OAuth2 device authorization flow.
Recommendation
It is recommended to immediately update FreeIPA to a version containing the fix for the off-by-one errors in ipa-otpd. Until the update is applied, limit trust in external OAuth2/OIDC providers and monitor network traffic to identity provider endpoints.
Other vulnerabilities in FreeIPA
See all- CVE-2017-11191High
FreeIPA 4.x with API version 2.213 allows remote authenticated users to bypass intended account-locking restrictions via an unlock action with an old session ID (for the same user account) that had been created for an earlier session.
- CVE-2015-5179High
FreeIPA might display user data improperly via vectors involving non-printable characters.
- CVE-2016-7030High
FreeIPA uses a default password policy that locks an account after 5 unsuccessful authentication attempts. This allows remote attackers to cause a denial of service by locking out the account in which system services run on.
- CVE-2016-5414High
FreeIPA version 4.4.0 allows remote attackers to request an arbitrary SAN name for services.
- CVE-2026-76578Critical
A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services.
- CVE-2026-11861Critical
A flaw was found in FreeIPA. When a trust relationship is configured with Active Directory, AD users can bypass authentication for FreeIPA services by impersonating a client name in the TGS due to missing PAC certificate verification. This could allow an authenticated AD user to escalate privileges within the FreeIPA domain.
- CVE-2025-4404Critical
A privilege escalation from host to domain vulnerability was found in FreeIPA. The lack of uniqueness validation for the `krbCanonicalName` attribute of the admin account allows creating a service with the same canonical name as the REALM admin. A successful attack lets the attacker obtain a Kerberos ticket with admin@REALM credentials.
- CVE-2015-5284Critical
In FreeIPA before version 4.2.2, the ipa-kra-install script places the CA agent certificate and private key in /etc/httpd/alias/kra-agent.pem, which is world readable.
- CVE-2026-115221Medium
A flaw was found in FreeIPA. An improper authorization check allows an authenticated host to retrieve and revoke digital certificates assigned to other users or services. This issue occurs because FreeIPA verifies ownership solely by matching the host name to the certificate's subject Common Name (CN), without confirming actual ownership in the directory service. Consequently, an enrolled host can disrupt services by revoking certificates belonging to other entities.
- CVE-2026-18147High
A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the FreeIPA/IdM Web UI password reset page. An unauthenticated remote attacker can exploit it by enticing a victim to click a crafted link and complete a password reset, allowing injection and execution of arbitrary JavaScript in the victim's session.
Original NVD description (English source)
Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may be able to trigger ipa-otpd to write or read one byte past the end of a fixed-size buffer. Exploitation requires FreeIPA to be configured with an external IdP, attacker control or MITM of that IdP, and a user to initiate the OAuth2 device authorization flow. The most likely impact is limited denial of service affecting the ipa-otpd daemon.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS