What is CVE-2026-86507?

CVE-2026-86507 is a medium-severity vulnerability in Apache Software Foundation Roller, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-28.

How severe is CVE-2026-86507?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Apache Software Foundation Roller

CVE-2026-86507

Improper neutralization of input in Apache Roller 6.1.5 allows an anonymous remote attacker to store a crafted comment-author URL that can execute script in the session of a weblog moderator or global administrator when the comment management page is viewed. This affects sites that permit comments on at least one weblog and whose moderator subsequently reviews the submitted comment; no non-default server setting is required. Users are recommended to upgrade to Apache Roller 6.1.6 or later.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-28 · last modified 2026-09-28.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Apache Software Foundation Roller — versions 6.1.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/apache/roller/pull/181 (patch)
lists.apache.org/thread/rjyxvm0fgtdfxwkj5qv532htdbs05wff (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-86507?: CVE-2026-86507 is a medium-severity vulnerability in Apache Software Foundation Roller, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-28.
How severe is CVE-2026-86507?: Medium severity. CVSS v3 base score is 6.1 out of 10.