What is CVE-2026-48788?

CVE-2026-48788 is a high-severity vulnerability in Umputun Remark42, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-06-17.

How severe is CVE-2026-48788?

High severity. CVSS v3 base score is 8.2 out of 10.

XSS in Umputun Remark42

CVE-2026-48788

Remark42 is a self-hosted comment engine for blogs, articles, or any other place where readers can add comments. Versions 1.6.0 through 1.15.0 contain a Cross-Site Scripting (XSS) vulnerability exploitable through content-type spoofing. Th…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Umputun Remark42 — versions >= 1.6.0, < 1.16.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-436

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-48788?: CVE-2026-48788 is a high-severity vulnerability in Umputun Remark42, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-06-17.
How severe is CVE-2026-48788?: High severity. CVSS v3 base score is 8.2 out of 10.