{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19931 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-19931 is a critical authentication bypass vulnerability in Haxx Curl, published on 6 Sep 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-2026-19931 and fix it if it is affected.\n\nWhat it is: CVE-2026-19931 is a critical authentication bypass vulnerability in Haxx Curl, published on 6 Sep 2026. 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-2026-19931 exists.\n\nAffected product: Haxx Curl. 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-2026-19931/ (Markdown: https://insights.sbomify.com/CVE-2026-19931/index.md)","id":"CVE-2026-19931","markdown":"https://insights.sbomify.com/CVE-2026-19931/index.md","name":"CVE-2026-19931","record":{"aliases":["ALPINE-CVE-2026-19931","AZL-99752","AZL-99777","AZL-99792","AZL-99819","AZL-99843","AZL-99870","BELL-CVE-2026-19931","CURL-CVE-2026-19931","DEBIAN-CVE-2026-19931","ECHO-5bd0-12f6-d009","GHSA-rhw6-3rrg-mwjq","MINI-2v5v-cpp3-q7j3","MINI-42wr-8w2m-45mh","ROOT-OS-ALPINE-315-CVE-2026-19931","ROOT-OS-ALPINE-320-CVE-2026-19931","ROOT-OS-ALPINE-321-CVE-2026-19931","ROOT-OS-ALPINE-322-CVE-2026-19931","ROOT-OS-DEBIAN-12-CVE-2026-19931","ROOT-OS-DEBIAN-13-CVE-2026-19931"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"HTTP client library","requires_auth":"none","summary":"libcurl may reuse authenticated connections for unauthenticated requests, allowing attackers to intercept or send data as another user.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"curl","cpe":[{"product":"curl","vendor":"haxx"}],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-488","name":"Exposure of Data Element to Wrong Session"}],"description":"A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given\nhostname using Negotiate authentication, when the initial request is done\nusing empty credentials. This can make user B's request get sent over user A's\npreviously authenticated connection.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Negotiate ambient user conn reuse","id":"CVE-2026-19931","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"haxx:curl","products":["haxx:curl"],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"DefaultFuction Notice-System-Managent NoticeController execute GroovyShell.evaluate code injection","id":"CVE-2026-19932"},"packages":[],"prev":{"headline":"Dolibarr User Cloning card.php ldap injection","id":"CVE-2026-19930"},"products":["curl"],"published":"2026-09-06","related":[{"cvss_score":9.8,"headline":"HTTP/2 stream-dependency tree UAF","id":"CVE-2026-10536","kev_date_added":null,"published":"2026-07-03"},{"cvss_score":9.8,"headline":"cross-origin Digest auth state leak","id":"CVE-2026-11856","kev_date_added":null,"published":"2026-07-03"},{"cvss_score":9.8,"headline":"SASL double-free","id":"CVE-2026-8925","kev_date_added":null,"published":"2026-07-03"},{"cvss_score":9.8,"headline":"stale proxy password leak","id":"CVE-2026-9079","kev_date_added":null,"published":"2026-07-03"},{"cvss_score":9.8,"headline":"Code injection in curl","id":"CVE-2016-4606","kev_date_added":null,"published":"2020-02-21"},{"cvss_score":9.8,"headline":"Information disclosure in n/a","id":"CVE-2016-9953","kev_date_added":null,"published":"2018-03-12"}],"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":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["curl"]},"summary":"libcurl may reuse authenticated connections for unauthenticated requests, allowing attackers to intercept or send data as another user.","url":"https://insights.sbomify.com/CVE-2026-19931/"}