{"answers":{"affected":"2 open source packages ship an affected version, including rust-zserio.","exploited":"There is no known exploitation of GHSA-fpf5-4jw8-67x8 in the wild and no public exploit code.","fix":"Upgrade rust-zserio to 0.5.4 or later.","what":"GHSA-fpf5-4jw8-67x8 is a denial of service vulnerability in rust-zserio, published on 7 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for GHSA-fpf5-4jw8-67x8 and fix it if it is affected.\n\nWhat it is: GHSA-fpf5-4jw8-67x8 is a denial of service vulnerability in rust-zserio, published on 7 May 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 GHSA-fpf5-4jw8-67x8 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rust-zserio (crates.io): affected all versions; fixed in 0.5.4\n- rust-zserio (crates.io): affected all versions; fixed in 0.5.4\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/GHSA-fpf5-4jw8-67x8/ (Markdown: https://insights.sbomify.com/GHSA-fpf5-4jw8-67x8/index.md)","id":"GHSA-fpf5-4jw8-67x8","markdown":"https://insights.sbomify.com/GHSA-fpf5-4jw8-67x8/index.md","name":"GHSA-fpf5-4jw8-67x8","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust serialization library","requires_auth":"none","summary":"An attacker can cause denial of service by providing crafted data with large size values, forcing excessive memory allocation in the rust-zserio library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"### Impact\n\nWhen deserializing arrays, strings or bytes (blob) types zserio first reads the size of the variable, and then allocates sufficient memory to load data. Since the size is always trusted this can be abused by creating a data file with a large size value, causing the zserio runtime to allocate large amounts of memory.\n\n### Patches\n\nPlease cherry-pick [57f5fb](https://github.com/Danaozhong/rust-zserio/commit/57f5fb4a2a8611d58dbcc1a9221349206dd99c3c).\n\n### Workarounds\n\n- Do not accept `zserio`-encoded messages from non-trusted sources.\n- Allocate a maximum heap amount to `rust-zerio` to avoid impacting other applications.","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":"rust-zserio has Unbounded Memory Allocation","id":"GHSA-fpf5-4jw8-67x8","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":null,"packages":[{"ecosystem":"crates.io","fixed":["0.5.4"],"introduced":["0"],"last_affected":[],"package":"rust-zserio","purl":null,"source":"GHSA-fpf5-4jw8-67x8"},{"ecosystem":"crates.io","fixed":["0.5.4"],"introduced":["0"],"last_affected":[],"package":"rust-zserio","purl":"pkg:cargo/rust-zserio","source":"GHSA-fpf5-4jw8-67x8"}],"products":null,"published":"2026-05-07","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"An attacker can cause denial of service by providing crafted data with large size values, forcing excessive memory allocation in the rust-zserio library.","url":"https://insights.sbomify.com/GHSA-fpf5-4jw8-67x8/"}