CVE-2026-27826 describes an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in MCP Atlassian, a Model Context Protocol server for Confluence and Jira, affecting versions prior to 0.17.0. This high-severity flaw (CVSS 8.2) allows an attacker with adjacent network access to force the server to make outbound HTTP requests to arbitrary URLs by supplying specific headers without authentication. The potential impact includes theft of cloud IAM role credentials, internal network reconnaissance, and injection of attacker-controlled content into LLM tool results. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability. Organizations using affected versions should upgrade to 0.17.0 to remediate this risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.17.0CPE matchmatch criteria | cpe:2.3:a:sooperset:mcp_atlassian:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.