# CVE-2026-103870: Pulp-rpm: distribution tree publish creates directories from .treeinfo ids

Status: published. Published: 2026-10-07. Updated: 2026-11-13.

A flaw was found in pulp-rpm when it publishes a distribution tree. Addon and variant ids from .treeinfo are used as directory names. A user who can sync or upload that tree can make the publish task create a new directory outside the task work area and write that tree's repository metadata and packages there, as the Pulp worker user. An existing file or directory is not replaced. The flaw does not disclose data and does not stop the service.

## Remediation

- workaround: Syncing distribution trees only from a trusted upstream avoids a crafted .treeinfo from that source. An account that can upload a tree directly can still supply the file.

Otherwise, Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability. Customers are advised to apply the relevant security updates when they become available. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Satellite 6.16 for RHEL 8 (python-pulp-rpm): ≥ 0:3.26.9-1.el8pc; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Satellite 6.16 for RHEL 9 (python-pulp-rpm): ≥ 0:3.26.9-1.el9pc; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Satellite 6.17 for RHEL 9 (python-pulp-rpm): ≥ 0:3.27.14-1.el9pc; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Satellite 6.18 for RHEL 9 (python3.12-pulp-rpm): ≥ 0:3.29.12-1.el9pc; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Update Infrastructure 4 for Cloud Providers (python-pulp-rpm): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Update Infrastructure 4 for Cloud Providers (python-pulp-rpm-client): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Update Infrastructure 5 (python-pulp-rpm-client): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Update Infrastructure 5 (rhui5/rhua-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Update Infrastructure 5 (rhui5/rhua-tp-rhel9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.23% as of 2026-11-12; percentile 14.27%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2026:99949 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:99950 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:99952 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-103870 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2544606 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-103870; retrieved 2026-11-13; source updated 2026-11-13

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-103870; retrieved 2026-11-13; source updated Not reported

Revision: 4ae07650de88a39022c7a383db7f7ee642fe803b5b25f2989a41a867271c0283

Canonical: https://y2.dev/cve/CVE-2026-103870

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