{"answers":{"affected":"6 open source packages ship an affected version, including org.http4k:http4k-core.","exploited":"There is no known exploitation of CVE-2026-100725 in the wild and no public exploit code.","fix":"Upgrade org.http4k:http4k-core to a fixed version for your release line: 4.51.0.0, 5.42.0.0 or 6.48.0.0.","what":"CVE-2026-100725 is a high-severity vulnerability in http4k, published on 27 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-2026-100725 and fix it if it is affected.\n\nWhat it is: CVE-2026-100725 is a high-severity vulnerability in http4k, published on 27 Sep 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-2026-100725 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.http4k:http4k-core (Maven): affected all versions; fixed in 4.51.0.0\n- org.http4k:http4k-core (Maven): affected all versions; fixed in 4.51.0.0\n- org.http4k:http4k-core (Maven): affected from 5.0.0.0; fixed in 5.42.0.0\n- org.http4k:http4k-core (Maven): affected from 5.0.0.0; fixed in 5.42.0.0\n- org.http4k:http4k-core (Maven): affected from 6.0.0.0; fixed in 6.48.0.0\n- org.http4k:http4k-core (Maven): affected from 6.0.0.0; fixed in 6.48.0.0\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-2026-100725/ (Markdown: https://insights.sbomify.com/CVE-2026-100725/index.md)","id":"CVE-2026-100725","markdown":"https://insights.sbomify.com/CVE-2026-100725/index.md","name":"CVE-2026-100725","record":{"aliases":["GHSA-jggj-q26h-3m3c","GHSA-pr33-38xx-6r26"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Kotlin HTTP library","requires_auth":"none","summary":"Attackers can steal session cookies from one origin and send them to another due to missing cookie scoping checks in the http4k client library.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"http4k (Maven artifact org.http4k:http4k-core) before 6.48.0.0, 5.42.0.0, and 4.51.0.0 ships a BasicCookieStorage (client-side cookie store used by ClientFilters.Cookies) that does not enforce RFC 6265 scoping rules for the cookie domain, path, and Secure attributes. When a single BasicCookieStorage instance is used to talk to more than one origin or scheme, cookies stored for one origin can be sent to other origins, and cookies marked Secure can be sent over plain HTTP, potentially disclosing session cookies or other sensitive values to unauthorized hosts or network observers. Clients that use a storage instance for a single origin are not affected.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"http4k before 6.48.0.0 Cookie Scoping Bypass via BasicCookieStorage","id":"CVE-2026-100725","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":6,"n_references":3,"next":{"headline":"Missing authorization in GROWI","id":"CVE-2026-100727"},"packages":[{"ecosystem":"Maven","fixed":["4.51.0.0"],"introduced":["0"],"last_affected":[],"package":"org.http4k:http4k-core","purl":null,"source":"GHSA-pr33-38xx-6r26"},{"ecosystem":"Maven","fixed":["4.51.0.0"],"introduced":["0"],"last_affected":[],"package":"org.http4k:http4k-core","purl":"pkg:maven/org.http4k/http4k-core","source":"GHSA-pr33-38xx-6r26"},{"ecosystem":"Maven","fixed":["5.42.0.0"],"introduced":["5.0.0.0"],"last_affected":[],"package":"org.http4k:http4k-core","purl":null,"source":"GHSA-pr33-38xx-6r26"},{"ecosystem":"Maven","fixed":["5.42.0.0"],"introduced":["5.0.0.0"],"last_affected":[],"package":"org.http4k:http4k-core","purl":"pkg:maven/org.http4k/http4k-core","source":"GHSA-pr33-38xx-6r26"},{"ecosystem":"Maven","fixed":["6.48.0.0"],"introduced":["6.0.0.0"],"last_affected":[],"package":"org.http4k:http4k-core","purl":null,"source":"GHSA-pr33-38xx-6r26"},{"ecosystem":"Maven","fixed":["6.48.0.0"],"introduced":["6.0.0.0"],"last_affected":[],"package":"org.http4k:http4k-core","purl":"pkg:maven/org.http4k/http4k-core","source":"GHSA-pr33-38xx-6r26"}],"prev":{"headline":"http4k before 6.49.0.0 Host Header Routing Bypass via reverseProxy","id":"CVE-2026-100724"},"products":["http4k"],"published":"2026-09-27","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["http4k"]},"summary":"Attackers can steal session cookies from one origin and send them to another due to missing cookie scoping checks in the http4k client library.","url":"https://insights.sbomify.com/CVE-2026-100725/"}