{"answers":{"affected":"4 open source packages ship an affected version, including org.asynchttpclient:async-http-client.","exploited":"There is no known exploitation of CVE-2026-55688 in the wild and no public exploit code.","fix":"Upgrade org.asynchttpclient:async-http-client to a fixed version for your release line: 2.16.0 or 3.0.11.","what":"CVE-2026-55688 is a medium-severity vulnerability in AsyncHttpClient async-http-client, published on 1 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-2026-55688 and fix it if it is affected.\n\nWhat it is: CVE-2026-55688 is a medium-severity vulnerability in AsyncHttpClient async-http-client, published on 1 Jul 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-2026-55688 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.asynchttpclient:async-http-client (Maven): affected from 2.0.0; fixed in 2.16.0\n- org.asynchttpclient:async-http-client (Maven): affected from 2.0.0; fixed in 2.16.0\n- org.asynchttpclient:async-http-client (Maven): affected from 3.0.0.Beta1; fixed in 3.0.11\n- org.asynchttpclient:async-http-client (Maven): affected from 3.0.0.Beta1; fixed in 3.0.11\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-2026-55688/ (Markdown: https://insights.sbomify.com/CVE-2026-55688/index.md)","id":"CVE-2026-55688","markdown":"https://insights.sbomify.com/CVE-2026-55688/index.md","name":"CVE-2026-55688","record":{"aliases":["DEBIAN-CVE-2026-55688","ECHO-b895-5a76-be10","GHSA-m452-q8c9-rg2f","MINI-4w5m-f4hh-f9qh","MINI-58qp-7ffq-g6vq","MINI-f4gg-r526-v4fc","MINI-fx4x-6xwr-4gw9","UBUNTU-CVE-2026-55688","USN-8655-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Java HTTP client library","requires_auth":"none","summary":"Attackers can inject cookies for unrelated domains via AsyncHttpClient, potentially bypassing security controls in applications sharing a client instance.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-1275","name":"Sensitive Cookie with Improper SameSite Attribute"}],"description":"The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior to 2.16.0 and from 3.0.0.Beta1 prior to 3.0.11, ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without verifying that the responding host is allowed to set a cookie for that domain, leading to a cookie tossing / cookie injection issue. A host the client connects to can therefore plant a cookie scoped to an unrelated domain, and the client will then send that cookie on later requests to that domain. Applications that use a single AsyncHttpClient instance - and thus the default, shared CookieStore - to reach both an attacker-influenced host and a trusted host are impacted. This issue has been fixed in versions 2.16.0 and 3.0.11.","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":true,"headline":"AsyncHttpClient: Cookie stored for an unrelated domain (cookie tossing) via ThreadSafeCookieStore","id":"CVE-2026-55688","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"other","year":"2026"},"n_packages":4,"n_references":2,"next":{"headline":"OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset","id":"CVE-2026-55689"},"packages":[{"ecosystem":"Maven","fixed":["2.16.0"],"introduced":["2.0.0"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":null,"source":"GHSA-m452-q8c9-rg2f"},{"ecosystem":"Maven","fixed":["2.16.0"],"introduced":["2.0.0"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":"pkg:maven/org.asynchttpclient/async-http-client","source":"GHSA-m452-q8c9-rg2f"},{"ecosystem":"Maven","fixed":["3.0.11"],"introduced":["3.0.0.Beta1"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":null,"source":"GHSA-m452-q8c9-rg2f"},{"ecosystem":"Maven","fixed":["3.0.11"],"introduced":["3.0.0.Beta1"],"last_affected":[],"package":"org.asynchttpclient:async-http-client","purl":"pkg:maven/org.asynchttpclient/async-http-client","source":"GHSA-m452-q8c9-rg2f"}],"prev":{"headline":"ESF-IDF: Stack-Based Out-of-Bounds Write in JPEG Decoder DQT Marker Parsing","id":"CVE-2026-55687"},"products":["async-http-client"],"published":"2026-07-01","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":"2026-08-06","vendors":["AsyncHttpClient"]},"summary":"Attackers can inject cookies for unrelated domains via AsyncHttpClient, potentially bypassing security controls in applications sharing a client instance.","url":"https://insights.sbomify.com/CVE-2026-55688/"}