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Exploited and recent CVEs

• CVE-2026-77246 High 7.4 MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path 0.5%
• CVE-2026-77248 High 8.6 MCP Atlassian: Unauthenticated arbitrary local file read via upload_attachment file_path, chained with missing auth on streamable-http transport 0.5%
• CVE-2026-77256 High 8.3 MCP Atlassian: OAuth refresh-token backup file is world-readable under default Unix umask 0.3%
• CVE-2026-77249 Medium 5.3 MCP Atlassian: Incomplete fix for CVE-2026-27826: redirect-based SSRF via unhooked requests session in Jira user-permission lookup 0.3%
• CVE-2026-77259 High 7.7 MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials 0.4%
• CVE-2026-77268 Medium 5.5 MCP Atlassian: Insecure File Permissions on OAuth Token Storage 0.2%
• CVE-2026-77247 High 8.3 MCP Atlassian: Arbitrary server-local file upload to Jira/Confluence attachments via unrestricted file_path parameters 0.4%
• CVE-2026-77272 Medium 5.4 MCP Atlassian: Reflected XSS in OAuth Setup Callback Handler 0.3%
• CVE-2026-77269 Medium 6.5 MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read (incomplete fix for CVE-2026-27825) 0.4%
• CVE-2026-77266 Medium 6.5 MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read and exfiltration via MCP tool call 0.5%
• CVE-2026-77255 High 8.6 MCP Atlassian: Arbitrary File Read & Exfiltration (Confused Deputy) in JIRA update_issue 0.5%
• CVE-2026-77262 High 8.6 MCP Atlassian: Path Traversal / Arbitrary File Read in confluence_upload_attachment MCP tool (incomplete fix of CVE-2026-27825) 0.6%
• CVE-2026-77254 Critical 9.1 MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials 0.6%
• CVE-2026-77253 High 7.1 MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local files 0.4%
• CVE-2026-77257 High 8.3 MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths 0.4%
• CVE-2026-77261 High 7.1 MCP Atlassian: SSRF redirect protection missing for basic-auth and OAuth authentication branches 0.4%
• CVE-2026-77260 High 8.3 MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira) 0.4%
• CVE-2026-77271 High 8.3 MCP Atlassian: Incomplete path traversal fix allows intra-CWD module overwrite and RCE (bypass of CVE-2026-27825) 0.6%
• CVE-2026-77242 High 7.5 MCP Atlassian: Incomplete fix for CVE-2026-27826: DNS rebinding bypasses SSRF validation (validated IP not pinned) 0.3%
• CVE-2026-77243 High 8.8 MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass 0.5%
• CVE-2026-77251 High 8.3 MCP Atlassian: JIRA_PROJECTS_FILTER / CONFLUENCE_SPACES_FILTER allow forbidden-project content exfiltration (one LIVE-proven on Atlassian Cloud) 0.3%
• CVE-2026-77252 Medium 6.5 MCP Atlassian: JIRA_PROJECTS_FILTER and CONFLUENCE_SPACES_FILTER can be bypassed in search tools 0.3%
• CVE-2026-77267 High 8.3 mcp-atlassian has an incomplete SSRF remediation 0.3%
• CVE-2026-77250 Medium 6.1 MCP Atlassian: OAuth fallback token storage writes plaintext access and refresh tokens with group-readable permissions 0.1%
• CVE-2026-77244 Critical 10.0 [mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token 0.3%
• CVE-2026-77265 Medium 5.9 MCP Atlassian: SSRF via DNS Rebinding in Header-Based Authentication Flow 0.3%
• CVE-2026-77270 Medium 6.5 MCP Atlassian: Arbitrary File Read via Upload Attachment Tools 0.5%
• CVE-2026-77258 High 7.7 MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_safe_path() 0.4%
• CVE-2026-77274 High 8.8 MCP Atlassian: SSRF Protection Bypass 0.3%
• CVE-2026-73497 Medium 6.5 MCP Atlassian is a Model Context Protocol (MCP): DNS-rebinding TOCTOU bypass of the SSRF fix (CVE-2026-27826): unauthenticated SSRF to cloud metadata 0.4%