{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39843 exists.","fix":"No fix has been published for CVE-2026-39843 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-39843 is a high-severity server-side request forgery vulnerability in makeplane plane, published on 9 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-39843 and fix it if it is affected.\n\nWhat it is: CVE-2026-39843 is a high-severity server-side request forgery vulnerability in makeplane plane, published on 9 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39843 exists.\n\nAffected product: makeplane plane. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-39843/ (Markdown: https://insights.sbomify.com/CVE-2026-39843/index.md)","id":"CVE-2026-39843","markdown":"https://insights.sbomify.com/CVE-2026-39843/index.md","name":"CVE-2026-39843","record":{"aliases":["GHSA-9fr2-pprw-pp9j"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Plane project management","requires_auth":"low_privilege","summary":"An authenticated attacker can exploit incomplete redirect validation in favicon fetching to perform Server-Side Request Forgery and read private network resources.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"plane","vendor":"plane"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery when a normal html page contains a link tag with an href that redirects to a private IP address is supplied to Add link by an authenticated attacker with low privileges. Redirects for the main page URL are validated, but not the favicon fetch path. fetch_and_encode_favicon() still uses requests.get(favicon_url, ...) with the default redirect-following. This vulnerability is fixed in 1.3.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Plane has a Server-Side Request Forgery (SSRF) in Favicon Fetching","id":"CVE-2026-39843","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"NiceGUI has a Path Traversal in NiceGUI Upload Filename on Windows via Backslash Bypass of PurePosixPath Sanitization","id":"CVE-2026-39844"},"packages":[],"prev":{"headline":"OpenRemote is Vulnerable to Expression Injection","id":"CVE-2026-39842"},"products":["plane"],"published":"2026-04-09","related":[{"cvss_score":9.3,"headline":"Plane allows server side request forgery via /_next/image endpoint","id":"CVE-2024-47830","kev_date_added":null,"published":"2024-10-11"},{"cvss_score":8.5,"headline":"Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer","id":"CVE-2026-30242","kev_date_added":null,"published":"2026-03-06"},{"cvss_score":8.3,"headline":"Missing authorization in plane","id":"CVE-2026-46558","kev_date_added":null,"published":"2026-06-10"},{"cvss_score":7.7,"headline":"Plane Vulnerable to Full Read SSRF via Favicon Fetching in \"Add Link\" Feature","id":"CVE-2026-27706","kev_date_added":null,"published":"2026-02-25"},{"cvss_score":7.5,"headline":"Plane: Unauthenticated Workspace Member Information Disclosure","id":"CVE-2026-30244","kev_date_added":null,"published":"2026-03-06"},{"cvss_score":7.1,"headline":"Plane v0.7.1 - Unauthorized access to files","id":"CVE-2023-2268","kev_date_added":null,"published":"2023-07-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-13","vendors":["makeplane"]},"summary":"An authenticated attacker can exploit incomplete redirect validation in favicon fetching to perform Server-Side Request Forgery and read private network resources.","url":"https://insights.sbomify.com/CVE-2026-39843/"}