What is CVE-2026-58371?

CVE-2026-58371 is a low-severity vulnerability in Seaweedfs, classified under Cross-site Scripting. CVSS score: 3.1/10. Published 2026-06-30.

How severe is CVE-2026-58371?

Low severity. CVSS v3 base score is 3.1 out of 10.

XSS in Seaweedfs

CVE-2026-58371

SeaweedFS before 4.30 reflects the callback query parameter verbatim into responses served with Content-Type application/javascript in the shared writeJson helper (weed/server/common.go), with no callback-name validation, no X-Content-Type…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

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

Affected products

Seaweedfs — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-58371?: CVE-2026-58371 is a low-severity vulnerability in Seaweedfs, classified under Cross-site Scripting. CVSS score: 3.1/10. Published 2026-06-30.
How severe is CVE-2026-58371?: Low severity. CVSS v3 base score is 3.1 out of 10.