Security advisories

critical2026-09-22

CVE-2026-77244-[mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token

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sooperset/mcp-atlassian · GHSA-wrhw-j3f9-8vc6

high2026-09-22

CVE-2026-77274-MCP Atlassian: SSRF Protection Bypass

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sooperset/mcp-atlassian · GHSA-hgcf-4mq8-5266

high2026-09-22

CVE-2026-77271-MCP Atlassian: Incomplete path traversal fix allows intra-CWD module overwrite and RCE (bypass of GHSA-xjgw-4wvw-rgm4)

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sooperset/mcp-atlassian · GHSA-6vmq-24h2-pj7j

high2026-09-22

CVE-2026-77267-mcp-atlassian has an incomplete SSRF remediation

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sooperset/mcp-atlassian · GHSA-5wf4-jqxh-8gm3

medium2026-09-22

CVE-2026-77272-MCP Atlassian: Reflected XSS in OAuth Setup Callback Handler

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sooperset/mcp-atlassian · GHSA-g2r2-3j32-j27x

high2026-09-22

CVE-2026-77262-MCP Atlassian: Path Traversal / Arbitrary File Read in confluence_upload_attachment MCP tool (incomplete fix of GHSA-xjgw-4wvw-rgm4)

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sooperset/mcp-atlassian · GHSA-p6hp-93wp-fh6p

medium2026-09-22

CVE-2026-77268-MCP Atlassian: Insecure File Permissions on OAuth Token Storage

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sooperset/mcp-atlassian · GHSA-4596-2p6p-28cv

high2026-09-22

CVE-2026-77259-MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials

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sooperset/mcp-atlassian · GHSA-6cr4-ccf3-x7h4

high2026-09-22

CVE-2026-77261-MCP Atlassian: SSRF redirect protection missing for basic-auth and OAuth authentication branches

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sooperset/mcp-atlassian · GHSA-6529-c226-h328

medium2026-09-22

CVE-2026-77270-MCP Atlassian: Arbitrary File Read via Upload Attachment Tools

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sooperset/mcp-atlassian · GHSA-f26r-j276-ggg4

medium2026-09-22

CVE-2026-77265-MCP Atlassian: SSRF via DNS Rebinding in Header-Based Authentication Flow

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sooperset/mcp-atlassian · GHSA-49xv-9743-pw8w

medium2026-09-22

CVE-2026-77266-MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read and exfiltration via MCP tool call

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sooperset/mcp-atlassian · GHSA-mfv2-4wvm-9pgp

medium2026-09-22

CVE-2026-77269-MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read (incomplete fix for CVE-2026-27825)

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sooperset/mcp-atlassian · GHSA-h7wj-5v37-59r2

high2026-09-22

CVE-2026-77260-MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira)

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sooperset/mcp-atlassian · GHSA-f4p7-qx46-wc5j

high2026-09-22

CVE-2026-77257-MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths

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sooperset/mcp-atlassian · GHSA-mrq8-fv7v-hhjg

high2026-09-22

CVE-2026-77243-MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass

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sooperset/mcp-atlassian · GHSA-3r68-hf9h-887v

high2026-09-22

CVE-2026-77255-MCP Atlassian: Arbitrary File Read & Exfiltration (Confused Deputy) in JIRA update_issue

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sooperset/mcp-atlassian · GHSA-2xj6-xx86-cwwc

high2026-09-22

CVE-2026-77253-MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local files

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sooperset/mcp-atlassian · GHSA-vc25-24vv-fxxm

high2026-09-22

CVE-2026-77251-MCP Atlassian: JIRA_PROJECTS_FILTER / CONFLUENCE_SPACES_FILTER allow forbidden-project content exfiltration (one LIVE-proven on Atlassian Cloud)

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sooperset/mcp-atlassian · GHSA-w66g-j6c4-hcfc

high2026-09-22

CVE-2026-77246-MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path

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sooperset/mcp-atlassian · GHSA-wv8v-v4c5-v75j