{"answers":{"affected":"3 open source packages ship an affected version, including mcp-atlassian. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77274 exists.","fix":"Upgrade mcp-atlassian to 0.22.0 or later.","what":"CVE-2026-77274 is a high-severity server-side request forgery vulnerability in sooperset mcp-atlassian, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-77274 and fix it if it is affected.\n\nWhat it is: CVE-2026-77274 is a high-severity server-side request forgery vulnerability in sooperset mcp-atlassian, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77274 exists.\n\nAffected packages and fixed versions:\n- mcp-atlassian (PyPI): affected all versions; fixed in 0.22.0\n- mcp-atlassian (PyPI): affected all versions; fixed in 0.22.0\n- mcp-atlassian (PyPI): affected all versions; fixed in 0.22.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-77274/ (Markdown: https://insights.sbomify.com/CVE-2026-77274/index.md)","id":"CVE-2026-77274","markdown":"https://insights.sbomify.com/CVE-2026-77274/index.md","name":"CVE-2026-77274","record":{"aliases":["GHSA-hgcf-4mq8-5266","PYSEC-2026-4096"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"MCP Atlassian server","requires_auth":"none","summary":"An attacker can bypass SSRF protections in MCP Atlassian to access internal network resources via crafted URLs.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"mcp_atlassian","vendor":"mcp-atlassian"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, validate_url_for_ssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL authentication flow. A crafted URL can validate as an external hostname while the HTTP client connects to an internal host, permitting server-side requests to protected network resources. This issue is fixed in version 0.22.0.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"MCP Atlassian: SSRF Protection Bypass","id":"CVE-2026-77274","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Caddy: rewrite placeholder re-expansion","id":"CVE-2026-77281"},"packages":[{"ecosystem":"PyPI","fixed":["0.22.0"],"introduced":["0"],"last_affected":[],"package":"mcp-atlassian","purl":null,"source":"GHSA-hgcf-4mq8-5266"},{"ecosystem":"PyPI","fixed":["0.22.0"],"introduced":["0"],"last_affected":[],"package":"mcp-atlassian","purl":"pkg:pypi/mcp-atlassian","source":"GHSA-hgcf-4mq8-5266"},{"ecosystem":"PyPI","fixed":["0.22.0"],"introduced":["0"],"last_affected":[],"package":"mcp-atlassian","purl":"pkg:pypi/mcp-atlassian","source":"PYSEC-2026-4096"}],"prev":{"headline":"MCP Atlassian: Reflected XSS in OAuth Setup Callback Handler","id":"CVE-2026-77272"},"products":["mcp-atlassian"],"published":"2026-09-22","related":[{"cvss_score":10,"headline":"[mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token","id":"CVE-2026-77244","kev_date_added":null,"published":"2026-09-22"},{"cvss_score":9.1,"headline":"MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials","id":"CVE-2026-77254","kev_date_added":null,"published":"2026-09-22"},{"cvss_score":9.1,"headline":"MCP Atlassian has an arbitrary file write leading to arbitrary code execution via unconstrained download_path in confluence_download_attachment","id":"CVE-2026-27825","kev_date_added":null,"published":"2026-03-10"},{"cvss_score":8.8,"headline":"MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass","id":"CVE-2026-77243","kev_date_added":null,"published":"2026-09-22"},{"cvss_score":8.6,"headline":"MCP Atlassian: Unauthenticated arbitrary local file read via upload_attachment file_path, chained with missing auth on streamable-http transport","id":"CVE-2026-77248","kev_date_added":null,"published":"2026-09-22"},{"cvss_score":8.6,"headline":"MCP Atlassian: Arbitrary File Read \u0026 Exfiltration (Confused Deputy) in JIRA update_issue","id":"CVE-2026-77255","kev_date_added":null,"published":"2026-09-22"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-22","vendors":["sooperset"]},"summary":"An attacker can bypass SSRF protections in MCP Atlassian to access internal network resources via crafted URLs.","url":"https://insights.sbomify.com/CVE-2026-77274/"}