Vulnerability-Lookup

RHSA-2026:79112

Vulnerability from csaf_redhat - Published: 2026-10-08 15:44 - Updated: 2026-10-09 04:01

Summary

Red Hat Security Advisory: rhc-worker-playbook security update

Severity

Important

Notes

Topic: An update for rhc-worker-playbook is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: A worker for yggdrasil that receives Ansible playbooks and executes them against the local host. Security Fix(es): * ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown (CVE-2026-11837) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-11837

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.

7.3 (High)


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

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

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-0:0.2.3-6.el10_0.2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-0:0.2.3-6.el10_0.2.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-0:0.2.3-6.el10_0.2.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-0:0.2.3-6.el10_0.2.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-0:0.2.3-6.el10_0.2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debuginfo-0:0.2.3-6.el10_0.2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debuginfo-0:0.2.3-6.el10_0.2.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debuginfo-0:0.2.3-6.el10_0.2.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debuginfo-0:0.2.3-6.el10_0.2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debugsource-0:0.2.3-6.el10_0.2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debugsource-0:0.2.3-6.el10_0.2.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debugsource-0:0.2.3-6.el10_0.2.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.0.Z.E2S:rhc-worker-playbook-debugsource-0:0.2.3-6.el10_0.2.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

References

8 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:79112	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2487424	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-11837	self
https://bugzilla.redhat.com/show_bug.cgi?id=2487424	external
https://www.cve.org/CVERecord?id=CVE-2026-11837	external
https://nvd.nist.gov/vuln/detail/CVE-2026-11837	external

Acknowledgments

Valentino Paulon

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}

CVE-2026-11837 (GCVE-0-2026-11837)

Vulnerability from cvelistv5 – Published: 2026-06-10 05:03 – Updated: 2026-10-08 21:13

Title

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

Summary

Severity

7.3 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-10 13:57 UTC

CWE

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

Assigner

redhat CNA under the redhat root

CNA scorecard B 81/100 over 976 records in the last 180 days details

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:79112	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-11837	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2487424	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	Unaffected: 0:0.2.3-6.el10_0.2 , < * (rpm) cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1
Red Hat	Red Hat OpenStack Platform 18.0	cpe:/a:redhat:openstack:18.0

Date Public

2026-06-10 00:00

Credits

Red Hat would like to thank Valentino Paulon for reporting this issue.

Show details on NVD website

JSON

To clipboard

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          "packageName": "rhc-worker-playbook",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:79112

CVE-2026-11837 (GCVE-0-2026-11837)

Tags

Sightings

Nomenclature

Related by attack behaviour