RCE in Gotohttp
CVE-2026-13536
A vulnerability has been found in GotoHTTP up to 10.2. This issue affects some unknown processing of the file /reg.12x. The manipulation of the argument sn leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor explains: "We immediately removed unnecessary parameter echo from source code. However the URL in the issue description will never be used in browser nor exposed to user, so it will not bring secure problem in fact. So we don't upgrade server right now, it will be included in next version together with other features."
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Gotohttp — versions 10.0, 10.1, 10.2
Weakness classification (CWE)
References
- vuldb.com/vuln/374544 (technical-description, vdb-entry)
- vuldb.com/vuln/374544/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-13536 (third-party-advisory)
- vuldb.com/submit/842066 (third-party-advisory)
- github.com/Qq1111111111/CVE/issues/1 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-13536?
- CVE-2026-13536 is a medium-severity vulnerability in Gotohttp, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-06-29.
- How severe is CVE-2026-13536?
- Medium severity. CVSS v3 base score is 4.3 out of 10.