CVE-2026-77261

7.1 HIGHpublic exploit available

Published 2026-09-22 · Updated 2026-09-25

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, _make_ssrf_safe_hook is omitted from JiraFetcher and ConfluenceFetcher sessions created through the basic-auth and oauth_pat branches. If an attacker-controlled or compromised configured Atlassian instance returns a redirect to an internal address, those sessions can follow the redirect without revalidating its destination. This issue is fixed in version 0.22.0.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Weaknesses

CWE-918

Vendors

mcp-atlassian

Products

mcp atlassian

Public exploit & PoC references

https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460[Patch]
https://github.com/sooperset/mcp-atlassian/pull/1448[Patch]
https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0[Release Notes]
https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-6529-c226-h328[Exploit, Vendor Advisory]

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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