What is CVE-2026-27826?

CVE-2026-27826 is a high-severity vulnerability in Sooperset Mcp-atlassian, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.2/10. Published 2026-03-10.

How severe is CVE-2026-27826?

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

SSRF in Sooperset Mcp-atlassian

CVE-2026-27826

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, an unauthenticated attacker who can reach the mcp-atlassian HTTP endpoint can force the server process to make ou…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.001 (25.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N.

Affected products

Sooperset Mcp-atlassian — versions < 0.17.0

Weakness classification (CWE)

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

References

https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-7r34-79r5-rcc9 (x_refsource_CONFIRM)
https://github.com/sooperset/mcp-atlassian/commit/5cd697dfce9116ef330b8dc7a91291640e0528d9 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27826?: CVE-2026-27826 is a high-severity vulnerability in Sooperset Mcp-atlassian, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.2/10. Published 2026-03-10.
How severe is CVE-2026-27826?: High severity. CVSS v3 base score is 8.2 out of 10.