{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72583 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-72583 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-72583 is a medium-severity cross-site scripting vulnerability in fastschema, published on 10 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-72583 and fix it if it is affected.\n\nWhat it is: CVE-2026-72583 is a medium-severity cross-site scripting vulnerability in fastschema, published on 10 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-72583 in the wild and no public exploit code.\n\nAffected product: fastschema. 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-2026-72583/ (Markdown: https://insights.sbomify.com/CVE-2026-72583/index.md)","id":"CVE-2026-72583","markdown":"https://insights.sbomify.com/CVE-2026-72583/index.md","name":"CVE-2026-72583","record":{"aliases":["GHSA-6vrh-w6p3-v6fh"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"fastschema web application","requires_auth":"low_privilege","summary":"A low-privileged user can execute arbitrary JavaScript in other users' browsers by uploading a malicious SVG file that bypasses MIME type checks.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TuranSec","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"fastschema - Stored Cross-Site Scripting via MIME Type Bypass in File Upload","id":"CVE-2026-72583","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"fastschema - TOCTOU Race Condition Bypasses OTP Attempt Limit in Account Recovery","id":"CVE-2026-72584"},"packages":[],"prev":{"headline":"fastschema - Unauthenticated NULL Pointer Dereference DoS in Account Recovery Endpoint","id":"CVE-2026-72582"},"products":["fastschema"],"published":"2026-08-10","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-08-10","vendors":["fastschema"]},"summary":"A low-privileged user can execute arbitrary JavaScript in other users' browsers by uploading a malicious SVG file that bypasses MIME type checks.","url":"https://insights.sbomify.com/CVE-2026-72583/"}