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01 Record

CVE-2026-87853

Sssd: sssd: idp authentication prefix comparison allows cross-user impersonation

HighPUBLISHEDCNA: redhat
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

Sssd: sssd: idp authentication prefix comparison allows cross-user impersonation

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.32% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 25.6% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-29.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-09 16:06Z1 MO AGO
Last updated
2026-10-29 05:30Z10 HR AGO
Reserved
2026-09-09
Assigning CNA
redhat
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-187Partial String ComparisonVariant
Data version
5.2
Document digest
1bbd5f08ae7c9daa1f979791d442434c14c372094576bb2d7132e199c2fbc1bf

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Enterprise Linux 10Not specified—
Red HatRed Hat Enterprise Linux 6Not specified—
Red HatRed Hat Enterprise Linux 7Not specified—
Red HatRed Hat Enterprise Linux 8Not specified—
Red HatRed Hat Enterprise Linux 9Not specified—
Red HatRed Hat OpenShift Container Platform 4Not specified—

06 References

07 Fixed in

AlmaLinux 10

  • libipa_hbac
    Fixed in 2.12.0-3.el10_2.2
  • libsss_autofs
    Fixed in 2.12.0-3.el10_2.2
  • libsss_certmap
    Fixed in 2.12.0-3.el10_2.2
  • libsss_idmap
    Fixed in 2.12.0-3.el10_2.2
  • libsss_nss_idmap
    Fixed in 2.12.0-3.el10_2.2
  • libsss_nss_idmap-devel
    Fixed in 2.12.0-3.el10_2.2
  • libsss_sudo
    Fixed in 2.12.0-3.el10_2.2
  • python3-libipa_hbac
    Fixed in 2.12.0-3.el10_2.2
  • python3-libsss_nss_idmap
    Fixed in 2.12.0-3.el10_2.2
  • python3-sss
    Fixed in 2.12.0-3.el10_2.2
  • python3-sss-murmur
    Fixed in 2.12.0-3.el10_2.2
  • python3-sssdconfig
    Fixed in 2.12.0-3.el10_2.2
  • sssd
    Fixed in 2.12.0-3.el10_2.2
  • sssd-ad
    Fixed in 2.12.0-3.el10_2.2
  • sssd-client
    Fixed in 2.12.0-3.el10_2.2
  • sssd-common
    Fixed in 2.12.0-3.el10_2.2
  • sssd-common-pac
    Fixed in 2.12.0-3.el10_2.2
  • sssd-dbus
    Fixed in 2.12.0-3.el10_2.2
  • sssd-idp
    Fixed in 2.12.0-3.el10_2.2
  • sssd-ipa
    Fixed in 2.12.0-3.el10_2.2
  • sssd-kcm
    Fixed in 2.12.0-3.el10_2.2
  • sssd-krb5
    Fixed in 2.12.0-3.el10_2.2
  • sssd-krb5-common
    Fixed in 2.12.0-3.el10_2.2
  • sssd-ldap
    Fixed in 2.12.0-3.el10_2.2
  • sssd-nfs-idmap
    Fixed in 2.12.0-3.el10_2.2
  • sssd-passkey
    Fixed in 2.12.0-3.el10_2.2
  • sssd-proxy
    Fixed in 2.12.0-3.el10_2.2
  • sssd-tools
    Fixed in 2.12.0-3.el10_2.2
  • sssd-winbind-idmap
    Fixed in 2.12.0-3.el10_2.2

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • libipa_hbac
    Fixed in 2.12.0-3.el10_2.2
  • libsss_autofs
    Fixed in 2.12.0-3.el10_2.2
  • libsss_certmap
    Fixed in 2.12.0-3.el10_2.2
  • libsss_idmap
    Fixed in 2.12.0-3.el10_2.2
  • libsss_nss_idmap
    Fixed in 2.12.0-3.el10_2.2
  • libsss_nss_idmap-devel
    Fixed in 2.12.0-3.el10_2.2
  • libsss_sudo
    Fixed in 2.12.0-3.el10_2.2
  • python3-libipa_hbac
    Fixed in 2.12.0-3.el10_2.2
  • python3-libsss_nss_idmap
    Fixed in 2.12.0-3.el10_2.2
  • python3-sss
    Fixed in 2.12.0-3.el10_2.2
  • python3-sss-murmur
    Fixed in 2.12.0-3.el10_2.2
  • python3-sssdconfig
    Fixed in 2.12.0-3.el10_2.2
  • sssd
    Fixed in 2.12.0-3.el10_2.2
  • sssd-ad
    Fixed in 2.12.0-3.el10_2.2
  • sssd-client
    Fixed in 2.12.0-3.el10_2.2
  • sssd-common
    Fixed in 2.12.0-3.el10_2.2
  • sssd-common-pac
    Fixed in 2.12.0-3.el10_2.2
  • sssd-dbus
    Fixed in 2.12.0-3.el10_2.2
  • sssd-idp
    Fixed in 2.12.0-3.el10_2.2
  • sssd-ipa
    Fixed in 2.12.0-3.el10_2.2
  • sssd-kcm
    Fixed in 2.12.0-3.el10_2.2
  • sssd-krb5
    Fixed in 2.12.0-3.el10_2.2
  • sssd-krb5-common
    Fixed in 2.12.0-3.el10_2.2
  • sssd-ldap
    Fixed in 2.12.0-3.el10_2.2
  • sssd-nfs-idmap
    Fixed in 2.12.0-3.el10_2.2
  • sssd-passkey
    Fixed in 2.12.0-3.el10_2.2
  • sssd-proxy
    Fixed in 2.12.0-3.el10_2.2
  • sssd-tools
    Fixed in 2.12.0-3.el10_2.2
  • sssd-winbind-idmap
    Fixed in 2.12.0-3.el10_2.2

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • sssd
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • sssd
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • sssd
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.