{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-87823 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-87823 is a high-severity vulnerability in luben zstd-jni, published on 9 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-2026-87823 and fix it if it is affected.\n\nWhat it is: CVE-2026-87823 is a high-severity vulnerability in luben zstd-jni, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-87823 exists.\n\nAffected product: luben zstd-jni. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-87823/ (Markdown: https://insights.sbomify.com/CVE-2026-87823/index.md)","id":"CVE-2026-87823","markdown":"https://insights.sbomify.com/CVE-2026-87823/index.md","name":"CVE-2026-87823","record":{"aliases":["CLEANSTART-2026-BK85546","CLEANSTART-2026-CC37311","CLEANSTART-2026-RI59675","CLEANSTART-2026-UA88149","CLEANSTART-2026-UC40793","CLEANSTART-2026-VU34498","DEBIAN-CVE-2026-87823","GHSA-cm3p-487m-cmvq","GHSA-jfr6-9xqw-2g2q","UBUNTU-CVE-2026-87823"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Java zstd compression library","requires_auth":"none","summary":"Attackers can trigger out-of-bounds memory reads in zstd-jni via integer overflows, causing JVM crashes or data disclosure.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"zstd-jni 1.1.1 through 1.5.7-13 Out-of-Bounds Read via Direct ByteBuffer Frame-Size Methods","id":"CVE-2026-87823","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect","id":"CVE-2026-87824"},"packages":[],"prev":{"headline":"t-digest 3.1 through 3.3 Denial of Service via NaN Centroid Means in MergingDigest.fromBytes","id":"CVE-2026-87822"},"products":["zstd-jni"],"published":"2026-09-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-09","vendors":["luben"]},"summary":"Attackers can trigger out-of-bounds memory reads in zstd-jni via integer overflows, causing JVM crashes or data disclosure.","url":"https://insights.sbomify.com/CVE-2026-87823/"}