{"answers":{"affected":"3 open source packages ship an affected version, including @tryghost/activitypub and ghost.","exploited":"There is no known exploitation of CVE-2026-53950 in the wild and no public exploit code.","fix":"Upgrade @tryghost/activitypub to 3.1.0 or later.","what":"CVE-2026-53950 is a high-severity cross-site scripting vulnerability in TryGhost Ghost, published on 24 Jun 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-2026-53950 and fix it if it is affected.\n\nWhat it is: CVE-2026-53950 is a high-severity cross-site scripting vulnerability in TryGhost Ghost, published on 24 Jun 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: There is no known exploitation of CVE-2026-53950 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @tryghost/activitypub (npm): affected all versions; fixed in 3.1.0\n- @tryghost/activitypub (npm): affected all versions; fixed in 3.1.0\n- ghost (Bitnami): affected all versions; fixed in 3.1.0\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-2026-53950/ (Markdown: https://insights.sbomify.com/CVE-2026-53950/index.md)","id":"CVE-2026-53950","markdown":"https://insights.sbomify.com/CVE-2026-53950/index.md","name":"CVE-2026-53950","record":{"aliases":["BIT-ghost-2026-53950","GHSA-xpp7-93x6-v29m"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Ghost ActivityPub client","requires_auth":"none","summary":"An attacker can inject JavaScript into Ghost posts via a malicious ActivityPub server, potentially compromising user sessions or data.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"@tryghost/activitypub is Ghost’s social/federation client app. Prior to 3.1.0, the ActivityPub client in Ghost was vulnerable to JavaScript injection on posts shared by a maliciously customised ActivityPub server. This vulnerability is fixed in 3.1.0.","ecosystems":["Bitnami","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":"@tryghost/activitypub: XSS in Ghost's ActivityPub client","id":"CVE-2026-53950","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Copier: trust-prefix bypass via path traversal runs tasks unprompted","id":"CVE-2026-53951"},"packages":[{"ecosystem":"Bitnami","fixed":["3.1.0"],"introduced":["0"],"last_affected":[],"package":"ghost","purl":"pkg:bitnami/ghost","source":"BIT-ghost-2026-53950"},{"ecosystem":"npm","fixed":["3.1.0"],"introduced":["0"],"last_affected":[],"package":"@tryghost/activitypub","purl":null,"source":"GHSA-xpp7-93x6-v29m"},{"ecosystem":"npm","fixed":["3.1.0"],"introduced":["0"],"last_affected":[],"package":"@tryghost/activitypub","purl":"pkg:npm/%40tryghost/activitypub","source":"GHSA-xpp7-93x6-v29m"}],"prev":{"headline":"Ghost Content API filter bypass reveals private fields","id":"CVE-2026-53949"},"products":["Ghost"],"published":"2026-06-24","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-24","vendors":["TryGhost"]},"summary":"An attacker can inject JavaScript into Ghost posts via a malicious ActivityPub server, potentially compromising user sessions or data.","url":"https://insights.sbomify.com/CVE-2026-53950/"}