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Fencer Intel
critical 9.6

CVE-2026-11861 json

Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships

published 2mo ago modified 4d ago also EUVD-2026-63245

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

A flaw was found in FreeIPA. When a trust relationship is configured between FreeIPA and Active Directory, Active Directory users can bypass authentication for FreeIPA services, including the portal, SMB server, and LDAP directory. This is possible by impersonating a client name in the Ticket Granting Service (TGS) due to FreeIPA services not verifying Privilege Attribute Certificate (PAC) certificates. This vulnerability could allow an authenticated Active Directory user to escalate their privileges within the FreeIPA domain.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:4.13.4-1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.12.2-15.el10_0.7
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.6.8-5.el7_9.25
  • Red Hat Red Hat Enterprise Linux 8 8100020261007070536.823393f5, 8100020261007071200.143e9e98
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020261027121250.f153676a, 8040020261027121355.5b01ab7e
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020261027121250.f153676a, 8040020261027121355.5b01ab7e
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020261008133528.ada582f1, 8060020261008134123.c1533a64
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020261008133528.ada582f1, 8060020261008134123.c1533a64
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020261007071832.b0a6ceea, 8080020261007080925.e581a9e4
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020261007071832.b0a6ceea, 8080020261007080925.e581a9e4
  • Red Hat Red Hat Enterprise Linux 9 0:4.13.4-1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.10.1-12.el9_2.7
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.11.0-15.el9_4.9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.12.2-14.el9_6.8
  • ipa RHEL 8 4.9.13-21.module+el8.10.0+25042+a3bddcd5.3
  • pyusb RHEL 8 1.0.0-9.1.module+el8.9.0+18920+2223d05e
  • softhsm RHEL 8 2.6.0-5.module+el8.9.0+18911+94941f82
  • custodia RHEL 8 0.6.0-3.module+el8.9.0+18911+94941f82
  • slapi-nis RHEL 8 0.60.0-4.module+el8.10.0+20723+03062ebd
  • ipa-client RHEL 8 4.9.13-21.module+el8.10.0+25042+a3bddcd5.3
  • ipa-common RHEL 8 4.9.13-21.module+el8.10.0+25042+a3bddcd5.3
  • ipa-server RHEL 8 4.9.13-21.module+el8.10.0+25041+701625f4.3

red hat advisories RHSA-2026:83460RHSA-2026:83461RHSA-2026:83085RHSA-2026:83083RHSA-2026:83084RHSA-2026:82935

  • softhsm AlmaLinux 8 2.6.0-5.module_el8.6.0+2881+2f24dc92
  • softhsm AlmaLinux 8 2.6.0-5.module_el8.6.0+3031+2f24dc92
  • custodia AlmaLinux 8 0.6.0-3.module_el8.6.0+2881+2f24dc92
  • slapi-nis AlmaLinux 8 0.60.0-4.module_el8.10.0+3844+20e075e5.alma.1
  • ipa-client AlmaLinux 8 4.9.13-21.module_el8.10.0+4302+2d2000af.3
  • ipa-common AlmaLinux 8 4.9.13-21.module_el8.10.0+4302+2d2000af.3
  • ipa-server AlmaLinux 8 4.9.13-21.module_el8.10.0+4302+2d2000af.3
  • opendnssec AlmaLinux 8 2.1.7-2.module_el8.10.0+3980+d78e8e90

almalinux advisories ALSA-2026:83460ALSA-2026:72279ALSA-2026:70564

  • ipa Rocky Linux 8 4.9.13-21.module+el8.10.0+40089+03bf3c1f
  • ipa Rocky Linux 8 4.9.13-21.module+el8.10.0+40090+e6f37a74
  • pyusb Rocky Linux 8 1.0.0-9.1.module+el8.9.0+1372+09f67869
  • pyusb Rocky Linux 8 1.0.0-9.1.module+el8.9.0+1371+ffa84eb9
  • softhsm Rocky Linux 8 2.6.0-5.module+el8.9.0+1371+ffa84eb9
  • custodia Rocky Linux 8 0.6.0-3.module+el8.9.0+1371+ffa84eb9
  • slapi-nis Rocky Linux 8 0.60.0-4.module+el8.9.0+1573+39ab85f4
  • opendnssec Rocky Linux 8 2.1.7-2.module+el8.10.0+1960+1ed527b3

rocky linux advisories RLSA-2026:83460RLSA-2026:72279RLSA-2026:70564

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-11861 updated cvss 9.6

FreeIPA: idm: ipa: FreeIPA: Obtaining TGS with impersonating cname through trust relationships

  • Red Hat Enterprise Linux 6 ipa, ipa-client, ipa-python, ipa-server, ipa-admintools, ipa-server-selinux, +1 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) python3-ipatests 4.12.2-14.el9_6.8
    fixed: vendor fix RHSA-2026:83083
  • Red Hat Enterprise Linux AppStream (v. 8) pyusb 1.0.0-9.1.module+el8.9.0+18911+94941f82, pyusb 1.0.0-9.1.module+el8.9.0+18920+2223d05e, softhsm 2.6.0-5.module+el8.9.0+18911+94941f82, custodia 0.6.0-3.module+el8.9.0+18911+94941f82, ipa 4.9.13-21.module+el8.10.0+25041+701625f4.3, ipa 4.9.13-21.module+el8.10.0+25042+a3bddcd5.3, +50 more
    fixed: vendor fix RHSA-2026:83460
  • Red Hat Enterprise Linux AppStream (v. 9) ipa 4.13.4-1.el9_8, ipa-client 4.13.4-1.el9_8, ipa-common 4.13.4-1.el9_8, ipa-server 4.13.4-1.el9_8, ipa-selinux 4.13.4-1.el9_8, ipa-client-epn 4.13.4-1.el9_8, +12 more
    fixed: vendor fix RHSA-2026:70564
  • Red Hat Enterprise Linux AppStream (v. 10) ipa 4.13.4-1.el10_2, ipa-client 4.13.4-1.el10_2, ipa-common 4.13.4-1.el10_2, ipa-server 4.13.4-1.el10_2, ipa-selinux 4.13.4-1.el10_2, ipa-client-epn 4.13.4-1.el10_2, +12 more
    fixed: vendor fix RHSA-2026:72279
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) pyusb 1.0.0-9.module+el8.1.0+4098+f286395e, pyusb 1.0.0-9.module+el8.1.0+4107+4a66eb87, ipa 4.9.2-10.module+el8.4.0+25230+139d38e7.6, ipa 4.9.2-10.module+el8.4.0+25231+beff12c5.6, custodia 0.6.0-3.module+el8.1.0+4098+f286395e, softhsm 2.6.0-5.module+el8.4.0+10227+076cd560, +50 more
    fixed: vendor fix RHSA-2026:93452
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) pyusb 1.0.0-9.module+el8.1.0+4098+f286395e, pyusb 1.0.0-9.module+el8.1.0+4107+4a66eb87, ipa 4.9.8-13.module+el8.6.0+25053+bc39327b.4, ipa 4.9.8-13.module+el8.6.0+25054+4a5dd89b.4, custodia 0.6.0-3.module+el8.1.0+4098+f286395e, softhsm 2.6.0-5.module+el8.4.0+10227+076cd560, +50 more
    fixed: vendor fix RHSA-2026:89836
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) custodia 0.6.0-3.module+el8.1.0+4098+f286395e, ipa 4.9.11-11.module+el8.8.0+25043+cab6964c.6, ipa 4.9.11-11.module+el8.8.0+25045+e21657cc.6, pyusb 1.0.0-9.1.module+el8.7.0+15690+c8d45780, pyusb 1.0.0-9.1.module+el8.7.0+15691+2b2c1dd5, softhsm 2.6.0-5.module+el8.4.0+10227+076cd560, +50 more
    fixed: vendor fix RHSA-2026:83461
show 11 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) ipa 4.10.1-12.el9_2.7, ipa-client 4.10.1-12.el9_2.7, ipa-common 4.10.1-12.el9_2.7, ipa-server 4.10.1-12.el9_2.7, ipa-selinux 4.10.1-12.el9_2.7, ipa-client-epn 4.10.1-12.el9_2.7, +8 more
    fixed: vendor fix RHSA-2026:83085
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) ipa 4.11.0-15.el9_4.9, ipa-client 4.11.0-15.el9_4.9, ipa-common 4.11.0-15.el9_4.9, ipa-server 4.11.0-15.el9_4.9, ipa-selinux 4.11.0-15.el9_4.9, ipa-client-epn 4.11.0-15.el9_4.9, +8 more
    fixed: vendor fix RHSA-2026:83084
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) ipa 4.12.2-15.el10_0.7, ipa-client 4.12.2-15.el10_0.7, ipa-common 4.12.2-15.el10_0.7, ipa-server 4.12.2-15.el10_0.7, ipa-selinux 4.12.2-15.el10_0.7, ipa-client-epn 4.12.2-15.el10_0.7, +12 more
    fixed: vendor fix RHSA-2026:82935
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) ipa 4.12.2-14.el9_6.8, ipa-client 4.12.2-14.el9_6.8, ipa-common 4.12.2-14.el9_6.8, ipa-server 4.12.2-14.el9_6.8, ipa-selinux 4.12.2-14.el9_6.8, ipa-client-epn 4.12.2-14.el9_6.8, +12 more
    fixed: vendor fix RHSA-2026:83083
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) pyusb 1.0.0-9.module+el8.1.0+4098+f286395e, pyusb 1.0.0-9.module+el8.1.0+4107+4a66eb87, ipa 4.9.2-10.module+el8.4.0+25230+139d38e7.6, ipa 4.9.2-10.module+el8.4.0+25231+beff12c5.6, custodia 0.6.0-3.module+el8.1.0+4098+f286395e, softhsm 2.6.0-5.module+el8.4.0+10227+076cd560, +50 more
    fixed: vendor fix RHSA-2026:93452
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) pyusb 1.0.0-9.module+el8.1.0+4098+f286395e, pyusb 1.0.0-9.module+el8.1.0+4107+4a66eb87, ipa 4.9.8-13.module+el8.6.0+25053+bc39327b.4, ipa 4.9.8-13.module+el8.6.0+25054+4a5dd89b.4, custodia 0.6.0-3.module+el8.1.0+4098+f286395e, softhsm 2.6.0-5.module+el8.4.0+10227+076cd560, +50 more
    fixed: vendor fix RHSA-2026:89836
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) custodia 0.6.0-3.module+el8.1.0+4098+f286395e, ipa 4.9.11-11.module+el8.8.0+25043+cab6964c.6, ipa 4.9.11-11.module+el8.8.0+25045+e21657cc.6, pyusb 1.0.0-9.1.module+el8.7.0+15690+c8d45780, pyusb 1.0.0-9.1.module+el8.7.0+15691+2b2c1dd5, softhsm 2.6.0-5.module+el8.4.0+10227+076cd560, +50 more
    fixed: vendor fix RHSA-2026:83461
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3-ipatests 4.13.4-1.el9_8
    fixed: vendor fix RHSA-2026:70564
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) python3-ipatests 4.13.4-1.el10_2
    fixed: vendor fix RHSA-2026:72279
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) python3-ipatests 4.12.2-15.el10_0.7
    fixed: vendor fix RHSA-2026:82935
  • Red Hat Enterprise Linux Server (v. 7 ELS) ipa 4.6.8-5.el7_9.25, ipa-client 4.6.8-5.el7_9.25, ipa-common 4.6.8-5.el7_9.25, ipa-server 4.6.8-5.el7_9.25, ipa-server-dns 4.6.8-5.el7_9.25, python2-ipalib 4.6.8-5.el7_9.25, +6 more
    fixed: vendor fix RHSA-2026:93071

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-266 Incorrect Privilege Assignment

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.