{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21879 exists.","fix":"No fix has been published for CVE-2026-21879 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-21879 is a medium-severity vulnerability in kanboard, published on 8 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-21879 and fix it if it is affected.\n\nWhat it is: CVE-2026-21879 is a medium-severity vulnerability in kanboard, published on 8 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21879 exists.\n\nAffected product: kanboard. 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-2026-21879/ (Markdown: https://insights.sbomify.com/CVE-2026-21879/index.md)","id":"CVE-2026-21879","markdown":"https://insights.sbomify.com/CVE-2026-21879/index.md","name":"CVE-2026-21879","record":{"aliases":["GHSA-mhv9-7m9w-7hcq"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Kanboard project management","requires_auth":"none","summary":"Attackers can redirect authenticated users to malicious sites via protocol-relative URLs, enabling phishing and credential theft in Kanboard.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"kanboard","vendor":"kanboard"}],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49.","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":"Kanboard vulnerable to Open Redirect via protocol-relative URLs","id":"CVE-2026-21879","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"open_redirect","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Kanboard LDAP Injection Vulnerability can Lead to User Enumeration and Information Disclosure","id":"CVE-2026-21880"},"packages":[],"prev":{"headline":"BACnet Stack Improperly Limits Pathnames to a Restricted Directory","id":"CVE-2026-21878"},"products":["kanboard"],"published":"2026-01-08","related":[{"cvss_score":9.1,"headline":"Kanboard is Vulnerable to Reverse Proxy Authentication Bypass","id":"CVE-2026-21881","kev_date_added":null,"published":"2026-01-08"},{"cvss_score":9.1,"headline":"Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events","id":"CVE-2025-55010","kev_date_added":null,"published":"2025-08-12"},{"cvss_score":9.1,"headline":"Arbitrary File Read and Delete in kanboard","id":"CVE-2024-51747","kev_date_added":null,"published":"2024-11-11"},{"cvss_score":9.1,"headline":"Remote code execution through language setting in kanboard","id":"CVE-2024-51748","kev_date_added":null,"published":"2024-11-11"},{"cvss_score":8.8,"headline":"Business logic in n/a","id":"CVE-2017-12850","kev_date_added":null,"published":"2017-08-14"},{"cvss_score":8.8,"headline":"Business logic in n/a","id":"CVE-2017-12851","kev_date_added":null,"published":"2017-08-14"},{"cvss_score":8.5,"headline":"Kanboard is Missing Access Control on Plugin Installation leading to Administrative RCE","id":"CVE-2026-25924","kev_date_added":null,"published":"2026-02-11"}],"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":"2026-01-08","vendors":["kanboard"]},"summary":"Attackers can redirect authenticated users to malicious sites via protocol-relative URLs, enabling phishing and credential theft in Kanboard.","url":"https://insights.sbomify.com/CVE-2026-21879/"}