{"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-2026-27826 exists.","fix":"Upgrade mcp-atlassian to 0.17.0 or later.","what":"CVE-2026-27826 is a high-severity server-side request forgery vulnerability in sooperset mcp-atlassian, published on 10 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27826 and fix it if it is affected.\n\nWhat it is: CVE-2026-27826 is a high-severity server-side request forgery vulnerability in sooperset mcp-atlassian, published on 10 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27826 exists.\n\nAffected packages and fixed versions:\n- mcp-atlassian (PyPI): affected all versions; fixed in 0.17.0\n- mcp-atlassian (PyPI): affected all versions; fixed in 0.17.0\n- mcp-atlassian (PyPI): affected all versions; fixed in 0.17.0\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-2026-27826/ (Markdown: https://insights.sbomify.com/CVE-2026-27826/index.md)","id":"CVE-2026-27826","markdown":"https://insights.sbomify.com/CVE-2026-27826/index.md","name":"CVE-2026-27826","record":{"aliases":["GHSA-7r34-79r5-rcc9","PYSEC-2026-2621"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"MCP Atlassian server","requires_auth":"none","summary":"Unauthenticated attackers can force the MCP Atlassian server to make arbitrary outbound requests, enabling internal network reconnaissance and potential credential theft.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"mcp_atlassian","vendor":"sooperset"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},"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 version 0.17.0, an unauthenticated attacker who can reach the mcp-atlassian HTTP endpoint can force the server process to make outbound HTTP requests to an arbitrary attacker-controlled URL by supplying two custom HTTP headers without an `Authorization` header. No authentication is required. The vulnerability exists in the HTTP middleware and dependency injection layer — not in any MCP tool handler - making it invisible to tool-level code analysis. In cloud deployments, this could enable theft of IAM role credentials via the instance metadata endpoint (`169[.]254[.]169[.]254`). In any HTTP deployment it enables internal network reconnaissance and injection of attacker-controlled content into LLM tool results. Version 0.17.0 fixes the issue.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-27826.yaml","stars":null,"title":"mcp-atlassian \u003c 0.17.0 - Server-Side Request Forgery"}],"tier":"weaponised"},"has_fix":true,"headline":"MCP Atlassian has SSRF via unvalidated X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers","id":"CVE-2026-27826","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"EVerest: ISO15118 session_setup use-after-free can crash EVSE process","id":"CVE-2026-27828"},"packages":[{"ecosystem":"PyPI","fixed":["0.17.0"],"introduced":["0"],"last_affected":[],"package":"mcp-atlassian","purl":null,"source":"GHSA-7r34-79r5-rcc9"},{"ecosystem":"PyPI","fixed":["0.17.0"],"introduced":["0"],"last_affected":[],"package":"mcp-atlassian","purl":"pkg:pypi/mcp-atlassian","source":"GHSA-7r34-79r5-rcc9"},{"ecosystem":"PyPI","fixed":["0.17.0"],"introduced":["0"],"last_affected":[],"package":"mcp-atlassian","purl":"pkg:pypi/mcp-atlassian","source":"PYSEC-2026-2621"}],"prev":{"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"},"products":["mcp-atlassian"],"published":"2026-03-10","related":[],"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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-10","vendors":["sooperset"]},"summary":"Unauthenticated attackers can force the MCP Atlassian server to make arbitrary outbound requests, enabling internal network reconnaissance and potential credential theft.","url":"https://insights.sbomify.com/CVE-2026-27826/"}