{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-61500 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-61500 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-61500 is a critical 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-2026-61500 and fix it if it is affected.\n\nWhat it is: CVE-2026-61500 is a critical 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-2026-61500 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-2026-61500/ (Markdown: https://insights.sbomify.com/CVE-2026-61500/index.md)","id":"CVE-2026-61500","markdown":"https://insights.sbomify.com/CVE-2026-61500/index.md","name":"CVE-2026-61500","record":{"aliases":["GHSA-xxrm-3f86-v97j"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["privilege_escalation","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"HFS web server","requires_auth":"none","summary":"Remote attackers can forge admin sessions by predicting weak signing keys, leading to full administrative access and remote code execution.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-338","name":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"}],"description":"Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic Math.random() generator and discloses outputs of the same generator to unauthenticated clients during login. A remote attacker can collect a small number of login responses, reconstruct the generator's state, recover the signing key, and forge a valid administrator session cookie, leading to full administrative access and remote code execution via the server_code configuration feature.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-09-26","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-26T15:23:41Z","kind":"github_poc","ref":"https://github.com/aramosf/CVE-2026-61500","stars":0,"title":"CVE-2026-61500 Rejetto HFS predictable PRNG session forgery to RCE PoC and Docker lab"}],"tier":"poc_unverified"},"has_fix":false,"headline":"Rejetto HFS \u003c 3.2.1 Session Forgery via Predictable Signing Key","id":"CVE-2026-61500","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Rejetto HFS \u003c 3.2.1 Stored XSS in Admin Log Viewer","id":"CVE-2026-61501"},"packages":[],"prev":{"headline":"Vitec Flamingo 4.12.2 Unauthenticated OS Command Injection via gen_graphs.php","id":"CVE-2026-61498"},"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["rejetto"]},"summary":"Remote attackers can forge admin sessions by predicting weak signing keys, leading to full administrative access and remote code execution.","url":"https://insights.sbomify.com/CVE-2026-61500/"}