# CVE-2026-108338: Apache Roller: Stored cross-site scripting through AtomPub entry tags

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

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 5.0.1 through 6.1.6 allows an authenticated user with the Author role on a weblog to store script in entry tags submitted through AtomPub. Roller's tag filter allowed HTML characters in tag names, and the bundled gaurav, fauxcoly and frontpage themes and the showEntryTags macro print tag names without escaping, so the script runs in the browser of anyone who views the weblog. This matters when weblog authors are not trusted with script (weblogAdminsUntrusted=true, the default since 6.1.4). AtomPub is disabled by default. Users are recommended to upgrade to Apache Roller 6.1.7 or later, which removes HTML characters from tag names, including names stored earlier.

## 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/208

## Affected products and versions

- Apache Software Foundation / Apache Roller: ≥ 5.0.1; ≤ 6.1.6 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## Exploit evidence

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

## References

- https://github.com/apache/roller/pull/208 (CNA: apache; patch)

- https://lists.apache.org/thread/xh4kv1zpdzwtpy57hgm7hy576lz758or (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-108338; retrieved 2026-11-11; source updated 2026-11-11

Revision: bee83f57b401273d39283a904e50f3e85572795fa0c038182f276ab5fc6b5d1f

Canonical: https://y2.dev/cve/CVE-2026-108338

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