What is CVE-2026-82477?

CVE-2026-82477 is a medium-severity vulnerability in Mitre Heimdall, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-08-29.

How severe is CVE-2026-82477?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in Mitre Heimdall

CVE-2026-82477

In MITRE SAF Heimdall 2.11.6 through 2.13.x before 2.14.0, an SSRF issue allows remote attackers to access internal network resources via the Tenable proxy endpoint. This occurs in apps/backend/src/tenable/tenable.controller.ts.

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Mitre Heimdall

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-82477?: CVE-2026-82477 is a medium-severity vulnerability in Mitre Heimdall, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-08-29.
How severe is CVE-2026-82477?: Medium severity. CVSS v3 base score is 5.8 out of 10.