{"answers":{"affected":"1 open source package ship an affected version, including wasmtime.","exploited":"There is no known exploitation of CVE-2026-115383 in the wild and no public exploit code.","fix":"Upgrade wasmtime to a fixed version for your release line: 48.0.4 or 49.0.2.","what":"CVE-2026-115383 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115383 and fix it if it is affected.\n\nWhat it is: CVE-2026-115383 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 22 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-115383 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- wasmtime (crates.io): affected from 47.0.0; fixed in 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-2026-115383/ (Markdown: https://insights.sbomify.com/CVE-2026-115383/index.md)","id":"CVE-2026-115383","markdown":"https://insights.sbomify.com/CVE-2026-115383/index.md","name":"CVE-2026-115383","record":{"aliases":["AZL-111008","AZL-111029","AZL-111083","AZL-111089","GHSA-cfhf-m2cr-62wj","GHSA-cvpp-75f3-xc4p","RUSTSEC-2026-0325","UBUNTU-CVE-2026-115383"],"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-1287","name":"Improper Validation of Specified Type of Input"}],"description":"Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains an improper validation vulnerability that accepts components whose core modules import WebAssembly tags with a subtype of the original type. Malicious guests can mis-type exception object payloads to corrupt the GC heap, causing Wasmtime to panic when the exceptions proposal is enabled.","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 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via Tag Imports","id":"CVE-2026-115383","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 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Stack Buffer Overflow","id":"CVE-2026-115384"},"packages":[{"ecosystem":"crates.io","fixed":["48.0.4","49.0.2"],"introduced":["47.0.0","49.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"RUSTSEC-2026-0325"}],"prev":{"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"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-22","vendors":["bytecodealliance"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115383/"}