{"answers":{"affected":"4 open source packages ship an affected version, including at.yawk.lz4:lz4-java and org.lz4:lz4-java.","exploited":"There is no known exploitation of CVE-2026-106451 in the wild and no public exploit code.","fix":"Upgrade at.yawk.lz4:lz4-java to 1.11.4 or later.","what":"CVE-2026-106451 is a high-severity vulnerability in yawkat lz4-java, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-106451 and fix it if it is affected.\n\nWhat it is: CVE-2026-106451 is a high-severity vulnerability in yawkat lz4-java, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-106451 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- at.yawk.lz4:lz4-java (Maven): affected all versions; fixed in 1.11.4\n- at.yawk.lz4:lz4-java (Maven): affected all versions; fixed in 1.11.4\n- org.lz4:lz4-java (Maven): affected from 1.7.0 up to 1.8.1; no fix listed\n- org.lz4:lz4-java (Maven): affected from 1.7.0 up to 1.8.1; no fix listed\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-2026-106451/ (Markdown: https://insights.sbomify.com/CVE-2026-106451/index.md)","id":"CVE-2026-106451","markdown":"https://insights.sbomify.com/CVE-2026-106451/index.md","name":"CVE-2026-106451","record":{"aliases":["CLEANSTART-2026-IA44862","CLEANSTART-2026-KU71354","CLEANSTART-2026-OZ05879","CLEANSTART-2026-TX68944","CLEANSTART-2026-WI71078","CLEANSTART-2026-XP90287","CLEANSTART-2026-YP08378","DEBIAN-CVE-2026-106451","ECHO-6344-f98f-134d","GHSA-mcr4-qmvw-px4g","MINI-24v7-jj9f-9gqr","MINI-2r7g-3c2v-q5mc","MINI-344r-9q57-856j","MINI-3gcf-692j-wh68","MINI-3pgf-49qx-86wr","MINI-48g2-hfwc-pwfv","MINI-4r67-57mq-vpjv","MINI-5f7x-pw74-c569","MINI-6gh2-8gvq-mw26","MINI-7m69-532p-9c23","MINI-7w33-cmqj-95xg","MINI-827v-7464-86gv","MINI-8ghp-r6qp-rwp4","MINI-c98g-qp9w-jxcw","MINI-f7fm-rr75-m9vg","MINI-fcfw-q574-hwgh","MINI-g429-w4c5-vw3q","MINI-gffw-6x8m-55jp","MINI-h2wx-c26q-v7gf","MINI-hhfw-h8x9-vr6q","MINI-hxw3-r947-4h84","MINI-j8v8-vgf5-8jwf","MINI-jrvj-c9hg-xq7p","MINI-m3xj-j7mg-5hc6","MINI-m8gc-2w5g-w89p","MINI-mv84-286f-j578","MINI-pw22-wjr3-jhj9","MINI-px8q-543q-jp3j","MINI-qh27-g577-vh3h","MINI-r3f7-vp88-rqqc","MINI-rf66-qx83-98fx","MINI-rqmh-w62v-xfgg","MINI-rrg5-pjgf-jqj5","MINI-rxpp-895f-56vg","MINI-v5wv-7rvh-2988","MINI-v8p4-42rg-2jpj","MINI-vc6q-xrh8-93jj","MINI-x96w-hw6g-fw7v","ROOT-APP-MAVEN-CVE-2026-106451","UBUNTU-CVE-2026-106451"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Java compression library","requires_auth":"low_privilege","summary":"A local attacker can exploit a race condition in native library extraction to replace the library file, potentially executing arbitrary code as the victim.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-377","name":"DEPRECATED: Insecure Temporary File"},{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"description":"yawkat LZ4 Java provides LZ4 compression for Java. From 1.7.0 until 1.11.4, net.jpountz.util.Native.load() uses File.createTempFile to create an exclusive temporary .lck file but derives the native-library path by removing the suffix, then FileOutputStream opens that predictable path without exclusive creation, allowing another local user with access to the same shared temporary directory to create or replace the library file before System.load() uses it. Successful exploitation depends on shared-directory permissions, host protections, and winning the race, and can execute native code as the victim; hardened systems may instead cause library loading to fail and fall back to Java implementations. Configurations using a system library, a private java.io.tmpdir, or Java-only implementations are not affected. This issue is fixed in version 1.11.4.","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":"yawkat LZ4 Java: Native library extraction to a shared temporary directory is vulnerable to file replacement by another local user","id":"CVE-2026-106451","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header","id":"CVE-2026-106452"},"packages":[{"ecosystem":"Maven","fixed":["1.11.4"],"introduced":["0"],"last_affected":[],"package":"at.yawk.lz4:lz4-java","purl":null,"source":"GHSA-mcr4-qmvw-px4g"},{"ecosystem":"Maven","fixed":["1.11.4"],"introduced":["0"],"last_affected":[],"package":"at.yawk.lz4:lz4-java","purl":"pkg:maven/at.yawk.lz4/lz4-java","source":"GHSA-mcr4-qmvw-px4g"},{"ecosystem":"Maven","fixed":[],"introduced":["1.7.0"],"last_affected":["1.8.1"],"package":"org.lz4:lz4-java","purl":null,"source":"GHSA-mcr4-qmvw-px4g"},{"ecosystem":"Maven","fixed":[],"introduced":["1.7.0"],"last_affected":["1.8.1"],"package":"org.lz4:lz4-java","purl":"pkg:maven/org.lz4/lz4-java","source":"GHSA-mcr4-qmvw-px4g"}],"prev":{"headline":"yawkat LZ4 Java: LZ4FrameInputStream reallocates block buffers for every frame, allowing CPU and GC amplification from small inputs","id":"CVE-2026-106450"},"products":["lz4-java"],"published":"2026-10-06","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":"total"},"state":"PUBLISHED","updated":"2026-10-07","vendors":["yawkat"]},"summary":"A local attacker can exploit a race condition in native library extraction to replace the library file, potentially executing arbitrary code as the victim.","url":"https://insights.sbomify.com/CVE-2026-106451/"}