{"answers":{"affected":"1 open source package ship an affected version, including zstd.","exploited":"There is no known exploitation of RUSTSEC-2026-0391 in the wild and no public exploit code.","fix":"Upgrade zstd to 0.14.3 or later.","what":"RUSTSEC-2026-0391 is a vulnerability in zstd, published on 16 Oct 2026."},"fix_prompt":"Check this codebase for RUSTSEC-2026-0391 and fix it if it is affected.\n\nWhat it is: RUSTSEC-2026-0391 is a vulnerability in zstd, published on 16 Oct 2026. \nExploitation: There is no known exploitation of RUSTSEC-2026-0391 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- zstd (crates.io): affected from 0.13.2; fixed in 0.14.3\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/RUSTSEC-2026-0391/ (Markdown: https://insights.sbomify.com/RUSTSEC-2026-0391/index.md)","id":"RUSTSEC-2026-0391","markdown":"https://insights.sbomify.com/RUSTSEC-2026-0391/index.md","name":"RUSTSEC-2026-0391","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The `with_context` constructors of the stream encoders and decoders used the\nborrowed context as it was. When a stream was abandoned on a context, for\nexample an encoder dropped before `finish()` after an error, whatever it\nleft there was carried into the next stream: the input buffered by the\nprevious encoder (up to 128 KiB, or all of it with `zstdmt`) became the\nstart of the next frame, and a decoder returned undelivered output of the\nprevious stream.\n\nAn application reusing one context for data that must stay separate, such\nas different users' requests, could disclose one user's plaintext to\nanother. Whoever supplies the data can cause the abandonment with invalid\ninput.\n\nThe flaw was corrected by resetting the context's session in\n`with_context`.","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":"Data from an abandoned stream leaks into the next stream on a reused context","id":"RUSTSEC-2026-0391","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":["0.14.3"],"introduced":["0.13.2"],"last_affected":[],"package":"zstd","purl":"pkg:cargo/zstd","source":"RUSTSEC-2026-0391"}],"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-2026-0391/"}