{"answers":{"affected":"7 open source packages ship an affected version, including wasmtime.","exploited":"There is no known exploitation of CVE-2026-115893 in the wild and no public exploit code.","fix":"Upgrade wasmtime to a fixed version for your release line: 36.0.19, 48.0.7 or 49.0.4.","what":"CVE-2026-115893 is a critical vulnerability in bytecodealliance wasmtime, published on 23 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115893 and fix it if it is affected.\n\nWhat it is: CVE-2026-115893 is a critical vulnerability in bytecodealliance wasmtime, published on 23 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-115893 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- wasmtime (crates.io): affected all versions; fixed in 36.0.19\n- wasmtime (crates.io): affected all versions; fixed in 36.0.19\n- wasmtime (crates.io): affected from 0.0.0-0; fixed in 36.0.19, 48.0.7, 49.0.4\n- wasmtime (crates.io): affected from 37.0.0; fixed in 48.0.7\n- wasmtime (crates.io): affected from 37.0.0; fixed in 48.0.7\n- wasmtime (crates.io): affected from 49.0.0; fixed in 49.0.4\n- wasmtime (crates.io): affected from 49.0.0; fixed in 49.0.4\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/CVE-2026-115893/ (Markdown: https://insights.sbomify.com/CVE-2026-115893/index.md)","id":"CVE-2026-115893","markdown":"https://insights.sbomify.com/CVE-2026-115893/index.md","name":"CVE-2026-115893","record":{"aliases":["AZL-111428","AZL-111434","DEBIAN-CVE-2026-115893","GHSA-mghf-wjfp-p5xm","RUSTSEC-2026-0379","UBUNTU-CVE-2026-115893"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":9.9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-691","name":"Insufficient Control Flow Management"}],"description":"Wasmtime is a runtime for WebAssembly. Prior to 36.0.19, 48.0.7, and 49.0.4, the Cranelift compiler backend on aarch64 can compile a Wasm br_table instruction with more than approximately 256,000 targets so that it has an incorrect conditional branch target. The branch can then jump to arbitrary other code at a user-controlled offset, allowing a user-controlled Wasm module to escape the sandbox on aarch64 engines using the default Cranelift backend. This issue is fixed in versions 36.0.19, 48.0.7, and 49.0.4.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":"2026-10-27","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-10-27T09:14:41Z","kind":"github_poc","ref":"https://github.com/shreyas-malhotra/CVE-2026-115893-wasmtime-sandbox-escape","stars":0,"title":"CVE-2026-115893: full Wasmtime aarch64 Cranelift br_table sandbox-escape public exploit, PoV, calibration notes, and verification evidence."}],"tier":"poc_unverified"},"has_fix":true,"headline":"Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction","id":"CVE-2026-115893","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":7,"n_references":12,"next":{"headline":"Happy DOM: Incomplete fix for CVE-2026-33943: unsanitized import alias leads to host code execution","id":"CVE-2026-115895"},"packages":[{"ecosystem":"crates.io","fixed":["36.0.19"],"introduced":["0"],"last_affected":[],"package":"wasmtime","purl":null,"source":"GHSA-mghf-wjfp-p5xm"},{"ecosystem":"crates.io","fixed":["36.0.19"],"introduced":["0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"GHSA-mghf-wjfp-p5xm"},{"ecosystem":"crates.io","fixed":["36.0.19","48.0.7","49.0.4"],"introduced":["0.0.0-0","37.0.0","49.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"RUSTSEC-2026-0379"},{"ecosystem":"crates.io","fixed":["48.0.7"],"introduced":["37.0.0"],"last_affected":[],"package":"wasmtime","purl":null,"source":"GHSA-mghf-wjfp-p5xm"},{"ecosystem":"crates.io","fixed":["48.0.7"],"introduced":["37.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"GHSA-mghf-wjfp-p5xm"},{"ecosystem":"crates.io","fixed":["49.0.4"],"introduced":["49.0.0"],"last_affected":[],"package":"wasmtime","purl":null,"source":"GHSA-mghf-wjfp-p5xm"},{"ecosystem":"crates.io","fixed":["49.0.4"],"introduced":["49.0.0"],"last_affected":[],"package":"wasmtime","purl":"pkg:cargo/wasmtime","source":"GHSA-mghf-wjfp-p5xm"}],"prev":{"headline":"Wasmtime: Panic lowering a host-created component model stream into a guest that expects a different payload type","id":"CVE-2026-115892"},"products":["wasmtime"],"published":"2026-10-23","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["bytecodealliance"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115893/"}