{"answers":{"affected":"1 open source package ship an affected version, including zstd-safe.","exploited":"There is no known exploitation of RUSTSEC-2026-0401 in the wild and no public exploit code.","fix":"Upgrade zstd-safe to 8.2.0 or later.","what":"RUSTSEC-2026-0401 is a vulnerability in zstd-safe, published on 16 Oct 2026."},"fix_prompt":"Check this codebase for RUSTSEC-2026-0401 and fix it if it is affected.\n\nWhat it is: RUSTSEC-2026-0401 is a vulnerability in zstd-safe, published on 16 Oct 2026. \nExploitation: There is no known exploitation of RUSTSEC-2026-0401 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- zstd-safe (crates.io): affected from 0.0.0-0; fixed in 8.2.0\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/RUSTSEC-2026-0401/ (Markdown: https://insights.sbomify.com/RUSTSEC-2026-0401/index.md)","id":"RUSTSEC-2026-0401","markdown":"https://insights.sbomify.com/RUSTSEC-2026-0401/index.md","name":"RUSTSEC-2026-0401","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"`ZDICT_trainFromBuffer` is never told the length of the samples buffer, so\n`train_from_buffer` checked that the sample sizes add up to it. With\noverflow checks off, as in release builds, that sum wrapped around: sizes\ntotalling 2^64 plus the buffer length passed the check, and the trainer read\npast the end of the buffer. `zstd::dict::from_continuous` relies on this\ncheck from zstd 0.4.10; older versions of zstd had their own, covered by a\nseparate advisory.\n\nThis requires the sample sizes to come from an untrusted source. The flaw\nwas corrected by summing the sizes with overflow checks.","ecosystems":["crates.io"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"Out-of-bounds read in `train_from_buffer` when sample sizes overflow","id":"RUSTSEC-2026-0401","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"crates.io","fixed":["8.2.0"],"introduced":["0.0.0-0"],"last_affected":[],"package":"zstd-safe","purl":"pkg:cargo/zstd-safe","source":"RUSTSEC-2026-0401"}],"products":null,"published":"2026-10-16","related":[],"sources":[{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/RUSTSEC-2026-0401/"}