{"answers":{"affected":"2 open source packages ship an affected version, including org.apache.httpcomponents.client5:httpclient5. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-64607 in the wild and no public exploit code.","fix":"Upgrade org.apache.httpcomponents.client5:httpclient5 to 5.6.3 or later.","what":"CVE-2026-64607 is a medium-severity denial of service vulnerability in Apache HttpComponents Client, published on 31 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-2026-64607 and fix it if it is affected.\n\nWhat it is: CVE-2026-64607 is a medium-severity denial of service vulnerability in Apache HttpComponents Client, published on 31 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-2026-64607 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.httpcomponents.client5:httpclient5 (Maven): affected from 5.0-alpha1; fixed in 5.6.3\n- org.apache.httpcomponents.client5:httpclient5 (Maven): affected from 5.0-alpha1; fixed in 5.6.3\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-2026-64607/ (Markdown: https://insights.sbomify.com/CVE-2026-64607/index.md)","id":"CVE-2026-64607","markdown":"https://insights.sbomify.com/CVE-2026-64607/index.md","name":"CVE-2026-64607","record":{"aliases":["CLEANSTART-2026-EK15836","CLEANSTART-2026-FO83563","CLEANSTART-2026-HB58573","CLEANSTART-2026-LH05062","CLEANSTART-2026-RC74250","CLEANSTART-2026-SO94492","CLEANSTART-2026-XL17660","CLSA-2026-1786537061","CLSA-2026-1789373020","CLSA-2026-1789474443","CLSA-2026-1792743499","CLSA-2026-1792743815","CLSA-2026-1792744283","DEBIAN-CVE-2026-64607","ECHO-315f-89e1-2302","GHSA-hjcp-jmpx-g3qm","MINI-26mh-mpvg-jvfj","MINI-2q5v-584p-6vj4","MINI-3p2c-82xr-jh42","MINI-43qp-gxv5-6xf8","MINI-4cfq-4qw9-hxgv","MINI-5324-q6pw-vfjm","MINI-573j-q8w8-wff5","MINI-5x3c-rvrf-6ppg","MINI-6xx7-f2mg-g7vr","MINI-9j4r-9x6r-x2gp","MINI-c3v8-6vvp-m4v6","MINI-crfv-8cj8-cg6r","MINI-cvhh-fcxc-72g5","MINI-f538-p42q-qpqx","MINI-fh7r-vx99-5r5g","MINI-fwph-pgqg-87xm","MINI-g988-4cq6-qhv7","MINI-h7rp-cprf-f9vq","MINI-hgm2-rgp9-mxx4","MINI-j5rm-ppf4-wwcw","MINI-jfc7-39pr-rmr9","MINI-m24q-v972-x73q","MINI-m7q7-wmrp-9gcf","MINI-pg85-wgwv-j59g","MINI-pgc2-4q6q-r3qh","MINI-pmqr-v96g-w55c","MINI-qhp3-qwxg-xrff","MINI-vg9f-7wv3-hhm8","MINI-vgx7-g3j6-23p6","MINI-vpxj-hc65-8mfw","MINI-wm66-r32w-gqg2","MINI-x2h3-2w74-jg45","MINI-xwmp-88gr-fqj6","MINI-xx69-jrqr-q8v7","RHLW-2026-8118b2499151de91","SUSE-SU-2026:4028-1","UBUNTU-CVE-2026-64607","openSUSE-SU-2026:11647-1","openSUSE-SU-2026:21894-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Java HTTP client library","requires_auth":"none","summary":"Attackers can cause connection pool exhaustion and denial of service by sending responses with invalid Content-Encoding headers to applications using the classic I/O model.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"httpclient","vendor":"apache"}],"cvss":{"score":5.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-772","name":"Missing Release of Resource after Effective Lifetime"}],"description":"HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model.\n\nThis issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.","ecosystems":["Maven","SUSE:Linux Enterprise Module for Development Tools 15 SP7","openSUSE:Leap 16.0","openSUSE:Tumbleweed"],"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":"Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS","id":"CVE-2026-64607","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":5,"n_references":1,"next":{"headline":"Apache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip paths","id":"CVE-2026-64608"},"packages":[{"ecosystem":"Maven","fixed":["5.6.3"],"introduced":["5.0-alpha1"],"last_affected":[],"package":"org.apache.httpcomponents.client5:httpclient5","purl":null,"source":"GHSA-hjcp-jmpx-g3qm"},{"ecosystem":"Maven","fixed":["5.6.3"],"introduced":["5.0-alpha1"],"last_affected":[],"package":"org.apache.httpcomponents.client5:httpclient5","purl":"pkg:maven/org.apache.httpcomponents.client5/httpclient5","source":"GHSA-hjcp-jmpx-g3qm"},{"ecosystem":"SUSE:Linux Enterprise Module for Development Tools 15 SP7","fixed":["4.5.14-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"httpcomponents-client","purl":"pkg:rpm/suse/httpcomponents-client\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7","source":"SUSE-SU-2026:4028-1"},{"ecosystem":"openSUSE:Leap 16.0","fixed":["4.5.14-160000.4.1"],"introduced":["0"],"last_affected":[],"package":"httpcomponents-client","purl":"pkg:rpm/opensuse/httpcomponents-client\u0026distro=openSUSE%20Leap%2016.0","source":"openSUSE-SU-2026:21894-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["4.5.14-2.1"],"introduced":["0"],"last_affected":[],"package":"httpcomponents-client","purl":"pkg:rpm/opensuse/httpcomponents-client\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11647-1"}],"prev":{"headline":"Apache Fory, Apache Fory: Class-registration bypass through an auto-admitted SerializedLambda capturing interface","id":"CVE-2026-64606"},"products":["Apache HttpComponents Client"],"published":"2026-07-31","related":[{"cvss_score":9.8,"headline":"Hostname verification in Apache HttpClient 4.3 was disabled by default","id":"CVE-2013-4366","kev_date_added":null,"published":"2017-10-30"},{"cvss_score":9.1,"headline":"Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM)","id":"CVE-2026-71290","kev_date_added":null,"published":"2026-08-11"},{"cvss_score":7.5,"headline":"Apache HttpComponents: PSL (Public Suffix List) validation bypass","id":"CVE-2025-27820","kev_date_added":null,"published":"2025-04-24"},{"cvss_score":7.3,"headline":"Apache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification","id":"CVE-2026-40542","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":5.8,"headline":"Improper Certificate Validation in Apache Commons HttpClient","id":"CVE-2012-5783","kev_date_added":null,"published":"2012-11-04"},{"cvss_score":5.3,"headline":"Cross-site scripting in Apache HttpClient","id":"CVE-2020-13956","kev_date_added":null,"published":"2020-12-02"}],"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":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-13","vendors":["Apache Software Foundation"]},"summary":"Attackers can cause connection pool exhaustion and denial of service by sending responses with invalid Content-Encoding headers to applications using the classic I/O model.","url":"https://insights.sbomify.com/CVE-2026-64607/"}