{"answers":{"affected":"2 open source packages ship an affected version, including atlassian-connect-express. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-26073 in the wild and no public exploit code.","fix":"Upgrade atlassian-connect-express to 6.6.0 or later.","what":"CVE-2021-26073 is a high-severity authentication bypass vulnerability in Atlassian Connect Express (ACE), published on 16 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-26073 and fix it if it is affected.\n\nWhat it is: CVE-2021-26073 is a high-severity authentication bypass vulnerability in Atlassian Connect Express (ACE), published on 16 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-26073 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- atlassian-connect-express (npm): affected from 3.0.2; fixed in 6.6.0\n- atlassian-connect-express (npm): affected from 3.0.2; fixed in 6.6.0\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-2021-26073/ (Markdown: https://insights.sbomify.com/CVE-2021-26073/index.md)","id":"CVE-2021-26073","markdown":"https://insights.sbomify.com/CVE-2021-26073/index.md","name":"CVE-2021-26073","record":{"aliases":["GHSA-4v96-m8xv-x83v"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Atlassian Connect Express","requires_auth":"low_privilege","summary":"An attacker can bypass authentication in Atlassian Connect Express by sending context JWTs to lifecycle endpoints, allowing unauthorized re-installation events.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"atlassian","cpe":[{"product":"connect_express","vendor":"atlassian"}],"cvss":{"score":7.7,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"Broken Authentication in Atlassian Connect Express (ACE) from version 3.0.2 before version 6.6.0: Atlassian Connect Express is a Node.js package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Express app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Express versions from 3.0.2 before 6.6.0 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Broken Authentication in Atlassian Connect Express","id":"CVE-2021-26073","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":2,"n_references":3,"next":{"headline":"Broken Authentication in Atlassian Connect Spring Boot","id":"CVE-2021-26074"},"packages":[{"ecosystem":"npm","fixed":["6.6.0"],"introduced":["3.0.2"],"last_affected":[],"package":"atlassian-connect-express","purl":null,"source":"GHSA-4v96-m8xv-x83v"},{"ecosystem":"npm","fixed":["6.6.0"],"introduced":["3.0.2"],"last_affected":[],"package":"atlassian-connect-express","purl":"pkg:npm/atlassian-connect-express","source":"GHSA-4v96-m8xv-x83v"}],"prev":{"headline":"Server-side request forgery in Confluence Data Center","id":"CVE-2021-26072"},"products":["Atlassian Connect Express (ACE)"],"published":"2021-04-16","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":"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-12","vendors":["Atlassian"]},"summary":"An attacker can bypass authentication in Atlassian Connect Express by sending context JWTs to lifecycle endpoints, allowing unauthorized re-installation events.","url":"https://insights.sbomify.com/CVE-2021-26073/"}