{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11856 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-11856 is a critical vulnerability in Haxx Curl, published on 3 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-2026-11856 and fix it if it is affected.\n\nWhat it is: CVE-2026-11856 is a critical vulnerability in Haxx Curl, published on 3 Jul 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-2026-11856 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-2026-11856/ (Markdown: https://insights.sbomify.com/CVE-2026-11856/index.md)","id":"CVE-2026-11856","markdown":"https://insights.sbomify.com/CVE-2026-11856/index.md","name":"CVE-2026-11856","record":{"aliases":["ALPINE-CVE-2026-11856","AZL-91803","AZL-91830","BELL-CVE-2026-11856","CLSA-2026-1783703539","CLSA-2026-1783705168","CLSA-2026-1783937591","CLSA-2026-1783937768","CLSA-2026-1783937975","CLSA-2026-1783942033","CLSA-2026-1784123512","CURL-CVE-2026-11856","DEBIAN-CVE-2026-11856","ECHO-895d-0fcf-45bd","GHSA-9crq-qh8v-6xmm","JLSEC-2026-1201","MINI-mhj4-jp68-cpm2","MINI-pmx3-xcpx-8ggp","ROOT-OS-ALPINE-315-CVE-2026-11856","ROOT-OS-ALPINE-320-CVE-2026-11856","ROOT-OS-ALPINE-321-CVE-2026-11856","ROOT-OS-ALPINE-322-CVE-2026-11856","ROOT-OS-DEBIAN-11-CVE-2026-11856","ROOT-OS-DEBIAN-12-CVE-2026-11856","ROOT-OS-DEBIAN-13-CVE-2026-11856","UBUNTU-CVE-2026-11856"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"curl library","requires_auth":"none","summary":"libcurl leaks Digest authentication headers to unintended hosts when reusing handles, potentially exposing credentials to attackers.","user_interaction":"not_required","vuln_class":"information_disclosure"},"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-294","name":"Authentication Bypass by Capture-replay"}],"description":"Successfully using libcurl to do a transfer to a specific HTTP origin\n(`hostA`) with **Digest** authentication and then changing the origin to a\ndifferent one (`hostB`) for a second transfer, reusing the same handle, makes\nlibcurl wrongly pass on the `Authorization:` header field meant for `hostA`,\nto `hostB`.","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":"cross-origin Digest auth state leak","id":"CVE-2026-11856","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"haxx:curl","products":["haxx:curl"],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Insecure .NET Remoting deserialization in Quanos SCHEMA ST4 Client Update Service allows local privilege escalation","id":"CVE-2026-11857"},"packages":[],"prev":{"headline":"Simple Membership \u003c 4.7.5 - Unauthenticated Stored XSS via Stripe Webhook API Version","id":"CVE-2026-11855"},"products":["curl"],"published":"2026-07-03","related":[{"cvss_score":9.8,"headline":"Negotiate ambient user conn reuse","id":"CVE-2026-19931","kev_date_added":null,"published":"2026-09-06"},{"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":"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 leaks Digest authentication headers to unintended hosts when reusing handles, potentially exposing credentials to attackers.","url":"https://insights.sbomify.com/CVE-2026-11856/"}