{"answers":{"affected":"4 open source packages ship an affected version, including org.asynchttpclient:async-http-client. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45300 exists.","fix":"Upgrade org.asynchttpclient:async-http-client to a fixed version for your release line: 2.15.0 or 3.0.10.","what":"CVE-2026-45300 is a high-severity vulnerability in AsyncHttpClient async-http-client, published on 5 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-45300 and fix it if it is affected.\n\nWhat it is: CVE-2026-45300 is a high-severity vulnerability in AsyncHttpClient async-http-client, published on 5 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45300 exists.\n\nAffected packages and fixed versions:\n- org.asynchttpclient:async-http-client (Maven): affected from 2.0.0; fixed in 2.15.0\n- org.asynchttpclient:async-http-client (Maven): affected from 2.0.0; fixed in 2.15.0\n- org.asynchttpclient:async-http-client (Maven): affected from 3.0.0.Beta1; fixed in 3.0.10\n- org.asynchttpclient:async-http-client (Maven): affected from 3.0.0.Beta1; fixed in 3.0.10\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-2026-45300/ (Markdown: https://insights.sbomify.com/CVE-2026-45300/index.md)","id":"CVE-2026-45300","markdown":"https://insights.sbomify.com/CVE-2026-45300/index.md","name":"CVE-2026-45300","record":{"aliases":["CLEANSTART-2026-LW03100","CLEANSTART-2026-WW03960","ECHO-3fd2-6923-7358","GHSA-fmxf-pm6p-7xgm","MINI-2xp7-hq6r-pf29","MINI-m668-g893-3h3m","ROOT-APP-MAVEN-CVE-2026-45300","UBUNTU-CVE-2026-45300"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Java HTTP client library","requires_auth":"none","summary":"The AsyncHttpClient library leaks session cookies to cross-origin redirect targets, allowing attackers to steal sensitive authentication data.","user_interaction":"required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"async-http-client","vendor":"asynchttpclient_project"}],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Versions on the 2.x branch prior to 2.15.0 and the 3.x branch prior to 3.0.10 leak `Cookie` headers to cross-origin redirect targets. When following a redirect to a different origin, the `propagatedHeaders()` method in `Redirect30xInterceptor.java` strips `Authorization` and `Proxy-Authorization` headers but does not strip the `Cookie` header, causing session cookies and other sensitive cookie values to be sent to attacker-controlled servers. Versions 2.15.0 and 3.0.10 patch the issue.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"async-http-client: Cookie header not stripped on cross-origin redirect","id":"CVE-2026-45300","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Open WebUI: Missing permission check in files API allows authenticated users to list, access and delete every uploaded file","id":"CVE-2026-45301"},"packages":[{"ecosystem":"Maven","fixed":["2.15.0"],"introduced":["2.0.0"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":null,"source":"GHSA-fmxf-pm6p-7xgm"},{"ecosystem":"Maven","fixed":["2.15.0"],"introduced":["2.0.0"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":"pkg:maven/org.asynchttpclient/async-http-client","source":"GHSA-fmxf-pm6p-7xgm"},{"ecosystem":"Maven","fixed":["3.0.10"],"introduced":["3.0.0.Beta1"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":null,"source":"GHSA-fmxf-pm6p-7xgm"},{"ecosystem":"Maven","fixed":["3.0.10"],"introduced":["3.0.0.Beta1"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":"pkg:maven/org.asynchttpclient/async-http-client","source":"GHSA-fmxf-pm6p-7xgm"}],"prev":{"headline":"Open WebUI: Stored Cross-Site Scripting In Profile Picture","id":"CVE-2026-45299"},"products":["async-http-client"],"published":"2026-06-05","related":[{"cvss_score":7.5,"headline":"Async HTTP Client has CRLF Injection vulnerability in HTTP request headers","id":"CVE-2023-0040","kev_date_added":null,"published":"2023-01-18"},{"cvss_score":7.5,"headline":"Improper Input Validation in async-http-client","id":"CVE-2017-14063","kev_date_added":null,"published":"2017-08-31"}],"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":"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":"2026-06-08","vendors":["AsyncHttpClient"]},"summary":"The AsyncHttpClient library leaks session cookies to cross-origin redirect targets, allowing attackers to steal sensitive authentication data.","url":"https://insights.sbomify.com/CVE-2026-45300/"}