{"answers":{"affected":"1 open source package ship an affected version, including wasmtime-wasi.","exploited":"There is no known exploitation of CVE-2026-115381 in the wild and no public exploit code.","fix":"Upgrade wasmtime-wasi to a fixed version for your release line: 36.0.17, 48.0.4 or 49.0.2.","what":"CVE-2026-115381 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115381 and fix it if it is affected.\n\nWhat it is: CVE-2026-115381 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 22 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-115381 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- wasmtime-wasi (crates.io): affected from 0.0.0-0; fixed in 36.0.17, 48.0.4, 49.0.2\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-2026-115381/ (Markdown: https://insights.sbomify.com/CVE-2026-115381/index.md)","id":"CVE-2026-115381","markdown":"https://insights.sbomify.com/CVE-2026-115381/index.md","name":"CVE-2026-115381","record":{"aliases":["DEBIAN-CVE-2026-115381","GHSA-gqmc-89g8-p25r","GHSA-m3j5-9cx2-7c68","RUSTSEC-2026-0322","UBUNTU-CVE-2026-115381"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an unbounded memory allocation in the wasmtime-wasi WASIp2 write-zeroes method of SinkOutputStream, the default stream used when stdout/stderr are not configured. A malicious WebAssembly guest can request huge zero-filled writes, exhausting host memory and causing denial of service.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an unbounded memory allocation in the wasmtime-wasi WASIp2","id":"CVE-2026-115381","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 wasi:http Zero Timeout Panic DoS","id":"CVE-2026-115382"},"packages":[{"ecosystem":"crates.io","fixed":["36.0.17","48.0.4","49.0.2"],"introduced":["0.0.0-0","37.0.0","49.0.0"],"last_affected":[],"package":"wasmtime-wasi","purl":"pkg:cargo/wasmtime-wasi","source":"RUSTSEC-2026-0322"}],"prev":{"headline":"Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASI","id":"CVE-2026-115380"},"products":["wasmtime"],"published":"2026-10-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-26","vendors":["bytecodealliance"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115381/"}