{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-61503 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-61503 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-61503 is a medium-severity vulnerability in rejetto hfs, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-61503 and fix it if it is affected.\n\nWhat it is: CVE-2026-61503 is a medium-severity vulnerability in rejetto hfs, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-61503 in the wild and no public exploit code.\n\nAffected product: rejetto hfs. 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-2026-61503/ (Markdown: https://insights.sbomify.com/CVE-2026-61503/index.md)","id":"CVE-2026-61503","markdown":"https://insights.sbomify.com/CVE-2026-61503/index.md","name":"CVE-2026-61503","record":{"aliases":["GHSA-pv44-gxjv-57j6"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"HTTP File Server","requires_auth":"none","summary":"Remote attackers can enumerate valid usernames by observing login response differences, facilitating further attacks like password guessing.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-204","name":"Observable Response Discrepancy"}],"description":"Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and session-forgery attacks.","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":"Rejetto HFS \u003c 3.2.1 Username Enumeration via Login Response Differences","id":"CVE-2026-61503","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Rejetto HFS \u003c 3.2.1 Stored XSS via File Names in Basic Web Listing","id":"CVE-2026-61504"},"packages":[],"prev":{"headline":"Rejetto HFS \u003c 3.2.1 Cross-Site Request Forgery via GET Requests","id":"CVE-2026-61502"},"products":["hfs"],"published":"2026-07-13","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["rejetto"]},"summary":"Remote attackers can enumerate valid usernames by observing login response differences, facilitating further attacks like password guessing.","url":"https://insights.sbomify.com/CVE-2026-61503/"}