What is CVE-2026-58591?

CVE-2026-58591 is a medium-severity vulnerability in Colorbox Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-10.

How severe is CVE-2026-58591?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Colorbox Project

CVE-2026-58591

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Colorbox allows Cross-Site Scripting (XSS). This issue affects Colorbox versions: from 0.0.0 to 2.1.5, from 0.0.0 to 2.2.0.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Colorbox_project Colorbox — versions 2.2.0
Drupal Colorbox — versions 0.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

mlhess@drupal.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-58591?: CVE-2026-58591 is a medium-severity vulnerability in Colorbox Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-10.
How severe is CVE-2026-58591?: Medium severity. CVSS v3 base score is 5.4 out of 10.