{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-70452 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-70452 is a critical authentication bypass vulnerability in RsyncProject rsync, published on 13 Aug 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-2026-70452 and fix it if it is affected.\n\nWhat it is: CVE-2026-70452 is a critical authentication bypass vulnerability in RsyncProject rsync, published on 13 Aug 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-2026-70452 in the wild and no public exploit code.\n\nAffected product: RsyncProject rsync. 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-2026-70452/ (Markdown: https://insights.sbomify.com/CVE-2026-70452/index.md)","id":"CVE-2026-70452","markdown":"https://insights.sbomify.com/CVE-2026-70452/index.md","name":"CVE-2026-70452","record":{"aliases":["ALPINE-CVE-2026-70452","AZL-95795","BELL-CVE-2026-70452","DEBIAN-CVE-2026-70452","ECHO-bdc4-0ff5-9a3d","GHSA-6692-28cx-wpqq","ROOT-OS-DEBIAN-11-CVE-2026-70452","UBUNTU-CVE-2026-70452"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass","data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"rsync file sync tool","requires_auth":"none","summary":"Remote attackers can bypass hostname-based access controls in rsync by triggering DNS failures, gaining unauthorized access to restricted file trees.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-636","name":"Not Failing Securely"}],"description":"rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.","ecosystems":[],"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":"rsync 3.1.0 \u003c 3.5.0 Access Control Bypass via DNS Resolution Failure","id":"CVE-2026-70452","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"rsync \u003c 3.5.0 Algorithmic Complexity DoS via hash_search()","id":"CVE-2026-70453"},"packages":[],"prev":{"headline":"Apache Wicket: Path traversal in resource style/variation/locale","id":"CVE-2026-70449"},"products":["rsync"],"published":"2026-08-13","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-14","vendors":["RsyncProject"]},"summary":"Remote attackers can bypass hostname-based access controls in rsync by triggering DNS failures, gaining unauthorized access to restricted file trees.","url":"https://insights.sbomify.com/CVE-2026-70452/"}