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NVD / CVE Program· CNA redhat

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

HighCVSS 7.3 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: Monitor (action score 29/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: rhc-worker-playbook (Red Hat:enterprise_linux_eus:10.0) 0:0.2.3-6.el10_0.2; rhc-worker-playbook-debuginfo (Red Hat:enterprise_linux_eus:10.0) 0:0.2.3-6.el10_0.2; rhc-worker-playbook-debugsource (Red Hat:enterprise_linux_eus:10.0) 0:0.2.3-6.el10_0.2.

Low priority for now. Upgrade to rhc-worker-playbook (Red Hat:enterprise_linux_eus:10.0) 0:0.2.3-6.el10_0.2; rhc-worker-playbook-debuginfo (Red Hat:enterprise_linux_eus:10.0) 0:0.2.3-6.el10_0.2; rhc-worker-playbook-debugsource (Red Hat:enterprise_linux_eus:10.0) 0:0.2.3-6.el10_0.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Jun 10, 2026
Updated
Nov 4, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-11837

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
enterprise linux10
enterprise linux8
enterprise linux9
openstack17.1
openstack18.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • 0:0.2.10-1.el10_2 and laternot affected · rpm
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

    • 0:0.2.3-6.el10_0.2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsaffected
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

    • 0:0.1.8-2.el8_6.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

    • 0:0.1.8-2.el8_6.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

    • 0:0.1.8-5.el8_8.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

    • 0:0.1.8-5.el8_8.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsaffected
    • all versionsunknown

  • Red Hat Red Hat OpenStack Platform 17.1

    • all versionsaffected

  • Red Hat Red Hat OpenStack Platform 18.0

    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12ansiblefrom 0—
Red Hat:enterprise_linux_eus:10.0rhc-worker-playbookbefore 0:0.2.3-6.el10_0.20:0.2.3-6.el10_0.2
Red Hat:enterprise_linux_eus:10.0rhc-worker-playbook-debuginfobefore 0:0.2.3-6.el10_0.20:0.2.3-6.el10_0.2
Red Hat:enterprise_linux_eus:10.0rhc-worker-playbook-debugsourcebefore 0:0.2.3-6.el10_0.20:0.2.3-6.el10_0.2
Red Hat:rhel_aus:8.6::appstreamrhc-worker-playbookbefore 0:0.1.8-2.el8_6.10:0.1.8-2.el8_6.1
Red Hat:rhel_e4s:8.8::appstreamrhc-worker-playbookbefore 0:0.1.8-5.el8_8.10:0.1.8-5.el8_8.1

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-10230Samba: command injection in wins server hook script
    52Plan
  • CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
    44Plan
  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-5419Jun 1, 2026 · Gnutls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal
    14Monitor
  • ← EarlierCVE-2026-3238Jun 8, 2026 · Samba: denial of service against ad dc wins server
    31Monitor
  • Later →CVE-2026-6893Jun 10, 2026 · Dracut: dracut: root code execution via dhcp options command injection
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:rhc-worker-playbook0:0.2.3-6.el10_0.2 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:rhc-worker-playbook-debuginfo0:0.2.3-6.el10_0.2 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:rhc-worker-playbook-debugsource0:0.2.3-6.el10_0.2 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:12026-06-23

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+13 d
  3. TodayNov 12, 2026+156 d

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-8776691 days apartBubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup
    35Monitor
  • CVE-2026-7965576 days apartSos: sos: path traversal in sos clean tar extraction via unvalidated symlink/hardlink targets leads to arbitrary file write
    31Monitor
  • CVE-2026-91151154 days apartCockpit: cockpit: local privilege escalation via insecure symlink handling in public key addition helper
    29Monitor
  • CVE-2026-7269462 days apartMrtg: mrtg daemon symlink-following chown allows local privilege escalation via pid file path manipulation
    28Monitor
  • CVE-2026-96279109 days apartFlatpak: flatpak: path traversal issue in oci archive extraction via hardlinks
    26Monitor
  • CVE-2026-111802128 days apartNautilus: nautilus: arbitrary file deletion via trash symlink
    26Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-59 · Improper Link Resolution Before File Access ('Link Following')

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records