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CVE Record

CVE-2026-11837: Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown

A local privilege escalation vulnerability was found in the ansible.posix authorized_key module. The module's keyfile() function uses os.chown() instead of os.lchown() and opens files without O_NOFOLLOW when managing SSH authorized keys. An unprivileged local user can pre-stage symbolic links in their ~/.ssh directory to redirect file ownership changes to arbitrary system paths when an operator runs the authorized_key task as root, leading to local privilege escalation.

HighCVSS 7.3Not KEV-listedUpdated
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Potential ATT&CK relevance

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Privilege behavior lookup

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CVE-2026-11837 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
7Timeline events
2ADP providers
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.3CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H1.35.9redhat
7.3CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H1.35.9redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.3High
CVSS 3.1 vector shape for CVE-2026-11837Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. ADP timelineredhat-SADP

    Reported to Red Hat.

  2. Source timelineredhat

    Reported to Red Hat.

  3. ADP timelineredhat-SADP

    Made public.

  4. Source timelineredhat

    Made public.

  5. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  6. CVE publishedCVE Program

    The CVE record was published.

  7. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown
other:Red Hat severity ratingcvssV3_1
  • 2026-06-07T00:00:00.000Z: Reported to Red Hat.
  • 2026-06-10T00:00:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 10.0 Extended Update Supportrhc-worker-playbook, 0:0.2.3-6.el10_0.2affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportrhc-worker-playbook, 0:0.1.8-2.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onrhc-worker-playbook, 0:0.1.8-2.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicerhc-worker-playbook, 0:0.1.8-5.el8_8.1affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionsrhc-worker-playbook, 0:0.1.8-5.el8_8.1affected
Red HatRed Hat Enterprise Linux 10rhc-worker-playbookaffected
Red HatRed Hat Enterprise Linux 10rhel-system-rolesunaffected
Red HatRed Hat Enterprise Linux 8rhc-worker-playbookaffected
Red HatRed Hat Enterprise Linux 8rhel-system-rolesunaffected
Red HatRed Hat Enterprise Linux 9rhc-worker-playbookaffected
Red HatRed Hat Enterprise Linux 9rhel-system-rolesunaffected
Red HatRed Hat OpenStack Platform 17.1ansible-collection-ansible-posixaffected
Red HatRed Hat OpenStack Platform 18.0ansible-collection-ansible-posixunaffected
Weakness

CWE details

CWE-59

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CWE-59 · source CWE mapping

Improper Link Resolution Before File Access ('Link Following')

Improper Link Resolution Before File Access ('Link Following') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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