{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53803 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-53803 is a high-severity path traversal vulnerability in RsyncProject rsync, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53803 and fix it if it is affected.\n\nWhat it is: CVE-2026-53803 is a high-severity path traversal vulnerability in RsyncProject rsync, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-53803 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-2026-53803/ (Markdown: https://insights.sbomify.com/CVE-2026-53803/index.md)","id":"CVE-2026-53803","markdown":"https://insights.sbomify.com/CVE-2026-53803/index.md","name":"CVE-2026-53803","record":{"aliases":["ALPINE-CVE-2026-53803","AZL-95771","BELL-CVE-2026-53803","DEBIAN-CVE-2026-53803","ECHO-4f46-4ddd-9dfd","GHSA-g9f4-7q66-9582","ROOT-OS-DEBIAN-11-CVE-2026-53803","UBUNTU-CVE-2026-53803"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["privilege_escalation","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"rsync file transfer","requires_auth":"low_privilege","summary":"Local attackers can overwrite arbitrary files via symlink following in rsync, potentially achieving privilege escalation on privileged installations.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"rsync","vendor":"samba"}],"cvss":{"score":8.5,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject symlinks during ancillary file writes to redirect output to arbitrary filesystem locations, achieving local privilege escalation on installations where rsync runs with elevated privileges such as setuid or privileged daemon configurations.","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 \u003c 3.5.0 Symlink Following Arbitrary File Overwrite","id":"CVE-2026-53803","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"OTRS Community Edition OS Command Injection via PGP Configuration","id":"CVE-2026-53804"},"packages":[],"prev":{"headline":"rsync \u003c 3.5.0 Arbitrary File Read via Symlink Following","id":"CVE-2026-53802"},"products":["rsync"],"published":"2026-08-13","related":[{"cvss_score":9.8,"headline":"Security feature bypass in n/a","id":"CVE-2017-15994","kev_date_added":null,"published":"2017-10-29"},{"cvss_score":9.1,"headline":"rsync \u003c 3.5.0 Daemon IP Spoofing via PROXY Protocol Header","id":"CVE-2026-53791","kev_date_added":null,"published":"2026-08-13"},{"cvss_score":8.8,"headline":"rsync 3.2.5 \u003c 3.5.0 Heap Out-of-Bounds Write via files-from Entry","id":"CVE-2026-70461","kev_date_added":null,"published":"2026-08-13"},{"cvss_score":8.7,"headline":"rsync 3.4.2 \u003c 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion","id":"CVE-2026-70455","kev_date_added":null,"published":"2026-08-13"},{"cvss_score":8.6,"headline":"rsync 3.1.0 \u003c 3.5.0 Authorization Bypass via auth users Directive Parsing","id":"CVE-2026-70463","kev_date_added":null,"published":"2026-08-13"},{"cvss_score":8.4,"headline":"rsync \u003c 3.5.0 Path Traversal via Symlink Module Root","id":"CVE-2026-53784","kev_date_added":null,"published":"2026-08-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"Local attackers can overwrite arbitrary files via symlink following in rsync, potentially achieving privilege escalation on privileged installations.","url":"https://insights.sbomify.com/CVE-2026-53803/"}