{"answers":{"affected":"3 open source packages ship an affected version, including github.com/woven-planet/go-zserio.","exploited":"There is no known exploitation of GHSA-xhj4-g6w8-2xjw in the wild and no public exploit code.","fix":"Upgrade github.com/woven-planet/go-zserio to 0.9.1 or later.","what":"GHSA-xhj4-g6w8-2xjw is a denial of service vulnerability in github.com/woven-planet/go-zserio, published on 24 Apr 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-xhj4-g6w8-2xjw and fix it if it is affected.\n\nWhat it is: GHSA-xhj4-g6w8-2xjw is a denial of service vulnerability in github.com/woven-planet/go-zserio, published on 24 Apr 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-xhj4-g6w8-2xjw in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/woven-planet/go-zserio (Go): affected all versions; fixed in 0.9.1\n- github.com/woven-planet/go-zserio (Go): affected all versions; fixed in 0.9.1\n- github.com/woven-planet/go-zserio (Go): affected all versions; fixed in 0.9.1\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-xhj4-g6w8-2xjw/ (Markdown: https://insights.sbomify.com/GHSA-xhj4-g6w8-2xjw/index.md)","id":"GHSA-xhj4-g6w8-2xjw","markdown":"https://insights.sbomify.com/GHSA-xhj4-g6w8-2xjw/index.md","name":"GHSA-xhj4-g6w8-2xjw","record":{"aliases":["GO-2026-5759"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go 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 go-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 apply [this commit](https://github.com/woven-by-toyota/go-zserio/commit/39ef1decde7e9766207794d396018776b33c6e45).\n\n### Workarounds\n\n- Do not accept zserio data from non-trusted sources.\n- Use secure transportation protocols (like TLS).","ecosystems":["Go"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"go-zserio has Unbounded Memory Allocation for All Platforms","id":"GHSA-xhj4-g6w8-2xjw","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":null,"packages":[{"ecosystem":"Go","fixed":["0.9.1"],"introduced":["0"],"last_affected":[],"package":"github.com/woven-planet/go-zserio","purl":null,"source":"GHSA-xhj4-g6w8-2xjw"},{"ecosystem":"Go","fixed":["0.9.1"],"introduced":["0"],"last_affected":[],"package":"github.com/woven-planet/go-zserio","purl":"pkg:golang/github.com/woven-planet/go-zserio","source":"GHSA-xhj4-g6w8-2xjw"},{"ecosystem":"Go","fixed":["0.9.1"],"introduced":["0"],"last_affected":[],"package":"github.com/woven-planet/go-zserio","purl":"pkg:golang/github.com/woven-planet/go-zserio","source":"GO-2026-5759"}],"products":null,"published":"2026-04-24","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"}],"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 go-zserio library.","url":"https://insights.sbomify.com/GHSA-xhj4-g6w8-2xjw/"}