# CVE-2026-105153: Apache Roller: XML external entity processing in AtomPub entry parsing

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

Improper Restriction of XML External Entity Reference in Apache Roller 4.0 through 6.1.6 allows an authenticated user with no weblog permissions to read files readable by the Roller process and cause the server to issue outbound HTTP requests to attacker-chosen destinations, by submitting a crafted Atom entry to the AtomPub endpoint. The entry body is parsed with a parser configuration that permits external parameter entities and external DTD subsets, and the parse happens before any per-weblog authorization check and before any check of whether the AtomPub feature is enabled, so the endpoint is reachable by any authenticated account on a default installation. Users are recommended to upgrade to Apache Roller 6.1.7 or later, which parses AtomPub entries with a hardened XML configuration and rejects AtomPub requests while the feature is disabled.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: apache) — https://github.com/apache/roller/pull/198
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: apache) — https://github.com/apache/roller/pull/201

## Affected products and versions

- Apache Software Foundation / Apache Roller: ≥ 4.0; ≤ 6.1.6 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 3.1: 7.7 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N; source: CNA: apache

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-611

## Exploit evidence

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

## References

- https://github.com/apache/roller/pull/198 (CNA: apache; patch)

- https://github.com/apache/roller/pull/201 (CNA: apache; patch)

- https://lists.apache.org/thread/w7dsz19261myrcwx8ssbwr67hc1wfosj (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-105153; retrieved 2026-11-11; source updated 2026-11-11

Revision: 63de63d66986ee44fcd7700501ff300e10fe0062704039ec1dada01f5139b91f

Canonical: https://y2.dev/cve/CVE-2026-105153

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