{"answers":{"affected":"2 open source packages ship an affected version, including showdown.","exploited":"There is no known exploitation of GHSA-h6mq-3cj6-h738 in the wild and no public exploit code.","fix":"Upgrade showdown to 1.9.1 or later.","what":"GHSA-h6mq-3cj6-h738 is a vulnerability in showdown, published on 3 Sep 2020. 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 GHSA-h6mq-3cj6-h738 and fix it if it is affected.\n\nWhat it is: GHSA-h6mq-3cj6-h738 is a vulnerability in showdown, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of GHSA-h6mq-3cj6-h738 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- showdown (npm): affected all versions; fixed in 1.9.1\n- showdown (npm): affected all versions; fixed in 1.9.1\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/GHSA-h6mq-3cj6-h738/ (Markdown: https://insights.sbomify.com/GHSA-h6mq-3cj6-h738/index.md)","id":"GHSA-h6mq-3cj6-h738","markdown":"https://insights.sbomify.com/GHSA-h6mq-3cj6-h738/index.md","name":"GHSA-h6mq-3cj6-h738","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript Markdown library","requires_auth":"none","summary":"Attackers can exploit reverse tabnabbing in showdown to access the original page's window object, facilitating phishing attacks against users.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Versions of `showdown` prior to 1.9.1 are vulnerable to [Reverse Tabnabbing](https://www.owasp.org/index.php/Reverse_Tabnabbing). The package uses `target='_blank'` in anchor tags, allowing attackers to access `window.opener` for the original page when opening links. This is commonly used for phishing attacks.\n\n## Recommendation\n\nUpgrade to version 1.9.1 or later.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"Reverse Tabnabbing in showdown","id":"GHSA-h6mq-3cj6-h738","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2020"},"n_packages":2,"n_references":null,"packages":[{"ecosystem":"npm","fixed":["1.9.1"],"introduced":["0"],"last_affected":[],"package":"showdown","purl":null,"source":"GHSA-h6mq-3cj6-h738"},{"ecosystem":"npm","fixed":["1.9.1"],"introduced":["0"],"last_affected":[],"package":"showdown","purl":"pkg:npm/showdown","source":"GHSA-h6mq-3cj6-h738"}],"products":null,"published":"2020-09-03","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"Attackers can exploit reverse tabnabbing in showdown to access the original page's window object, facilitating phishing attacks against users.","url":"https://insights.sbomify.com/GHSA-h6mq-3cj6-h738/"}