{"answers":{"affected":"It affects 10 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27535 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2023-27535 is a medium-severity authentication bypass vulnerability in Debian Debian Linux, published on 30 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-27535 and fix it if it is affected.\n\nWhat it is: CVE-2023-27535 is a medium-severity authentication bypass vulnerability in Debian Debian Linux, published on 30 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27535 exists.\n\nAffected product: Debian Debian Linux. 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-2023-27535/ (Markdown: https://insights.sbomify.com/CVE-2023-27535/index.md)","id":"CVE-2023-27535","markdown":"https://insights.sbomify.com/CVE-2023-27535/index.md","name":"CVE-2023-27535","record":{"aliases":["ALPINE-CVE-2023-27535","ALSA-2023:2650","ALSA-2023:3106","AZL-25787","AZL-25805","AZL-25811","AZL-25846","AZL-34611","AZL-38512","CLEANSTART-2026-LQ81593","CURL-CVE-2023-27535","DEBIAN-CVE-2023-27535","GHSA-q9fm-68jc-87x3","JLSEC-2025-31","RHSA-2023:2650","RHSA-2023:3106","RLSA-2023:3106","UBUNTU-CVE-2023-27535"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"libcurl FTP library","requires_auth":"none","summary":"An authentication bypass in libcurl's FTP connection reuse allows attackers to use wrong credentials, potentially accessing sensitive information.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"libcurl","vendor":"haxx"},{"product":"active_iq_unified_manager","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"},{"product":"ontap_9","vendor":"netapp"},{"product":"universal_forwarder","vendor":"splunk"}],"cvss":{"score":5.9,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"},{"id":"CWE-305","name":"Authentication Bypass by Primary Weakness"}],"description":"An authentication bypass vulnerability exists in libcurl \u003c8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.","ecosystems":["AlmaLinux:8","AlmaLinux:9","Red Hat:enterprise_linux:8::baseos","Red Hat:enterprise_linux:9::appstream","Red Hat:enterprise_linux:9::baseos","Rocky Linux:8"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Auth bypass in https://github.com/curl/curl","id":"CVE-2023-27535","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","haxx:libcurl","netapp:active_iq_unified_manager","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h700s_firmware","splunk:universal_forwarder"],"type":"auth_bypass","year":"2023"},"n_packages":34,"n_references":5,"next":{"headline":"Auth bypass in https://github.com/curl/curl","id":"CVE-2023-27536"},"packages":[{"ecosystem":"AlmaLinux:8","fixed":["7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"curl","purl":"pkg:rpm/almalinux/curl","source":"ALSA-2023:3106"},{"ecosystem":"AlmaLinux:8","fixed":["7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl","purl":"pkg:rpm/almalinux/libcurl","source":"ALSA-2023:3106"},{"ecosystem":"AlmaLinux:8","fixed":["7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl-devel","purl":"pkg:rpm/almalinux/libcurl-devel","source":"ALSA-2023:3106"},{"ecosystem":"AlmaLinux:8","fixed":["7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal","purl":"pkg:rpm/almalinux/libcurl-minimal","source":"ALSA-2023:3106"},{"ecosystem":"AlmaLinux:9","fixed":["7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl","purl":"pkg:rpm/almalinux/curl","source":"ALSA-2023:2650"},{"ecosystem":"AlmaLinux:9","fixed":["7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-minimal","purl":"pkg:rpm/almalinux/curl-minimal","source":"ALSA-2023:2650"},{"ecosystem":"AlmaLinux:9","fixed":["7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl","purl":"pkg:rpm/almalinux/libcurl","source":"ALSA-2023:2650"},{"ecosystem":"AlmaLinux:9","fixed":["7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-devel","purl":"pkg:rpm/almalinux/libcurl-devel","source":"ALSA-2023:2650"},{"ecosystem":"AlmaLinux:9","fixed":["7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal","purl":"pkg:rpm/almalinux/libcurl-minimal","source":"ALSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"curl","purl":"pkg:rpm/redhat/curl","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"curl-debuginfo","purl":"pkg:rpm/redhat/curl-debuginfo","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"curl-debugsource","purl":"pkg:rpm/redhat/curl-debugsource","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"curl-minimal-debuginfo","purl":"pkg:rpm/redhat/curl-minimal-debuginfo","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl","purl":"pkg:rpm/redhat/libcurl","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl-debuginfo","purl":"pkg:rpm/redhat/libcurl-debuginfo","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl-devel","purl":"pkg:rpm/redhat/libcurl-devel","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal","purl":"pkg:rpm/redhat/libcurl-minimal","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal-debuginfo","purl":"pkg:rpm/redhat/libcurl-minimal-debuginfo","source":"RHSA-2023:3106"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-debuginfo","purl":"pkg:rpm/redhat/curl-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-debugsource","purl":"pkg:rpm/redhat/curl-debugsource","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-minimal-debuginfo","purl":"pkg:rpm/redhat/curl-minimal-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-debuginfo","purl":"pkg:rpm/redhat/libcurl-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-devel","purl":"pkg:rpm/redhat/libcurl-devel","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal-debuginfo","purl":"pkg:rpm/redhat/libcurl-minimal-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl","purl":"pkg:rpm/redhat/curl","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-debuginfo","purl":"pkg:rpm/redhat/curl-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-debugsource","purl":"pkg:rpm/redhat/curl-debugsource","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-minimal","purl":"pkg:rpm/redhat/curl-minimal","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"curl-minimal-debuginfo","purl":"pkg:rpm/redhat/curl-minimal-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl","purl":"pkg:rpm/redhat/libcurl","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-debuginfo","purl":"pkg:rpm/redhat/libcurl-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal","purl":"pkg:rpm/redhat/libcurl-minimal","source":"RHSA-2023:2650"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:7.76.1-23.el9_2.1"],"introduced":["0"],"last_affected":[],"package":"libcurl-minimal-debuginfo","purl":"pkg:rpm/redhat/libcurl-minimal-debuginfo","source":"RHSA-2023:2650"},{"ecosystem":"Rocky Linux:8","fixed":["0:7.61.1-30.el8_8.2"],"introduced":["0"],"last_affected":[],"package":"curl","purl":"pkg:rpm/rocky-linux/curl?distro=rocky-linux-8\u0026epoch=0","source":"RLSA-2023:3106"}],"prev":{"headline":"Path traversal in https://github.com/curl/curl","id":"CVE-2023-27534"},"products":["https://github.com/curl/curl"],"published":"2023-03-30","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"An authentication bypass in libcurl's FTP connection reuse allows attackers to use wrong credentials, potentially accessing sensitive information.","url":"https://insights.sbomify.com/CVE-2023-27535/"}