Vulnerability in Webassembly Binaryen
CVE-2026-8257
A vulnerability was detected in WebAssembly Binaryen up to 117. This issue affects the function IRBuilder::makeBrOn of the file src/wasm/wasm-ir-builder.cpp of the component BrOn Parser. Performing a manipulation results in reachable asser…
EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Webassembly Binaryen — versions 117
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
- cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Third Party Advisory, Issue Tracking)
- cna@vuldb.com (issue-tracking, Patch, Mitigation, patch)
- cna@vuldb.com (Exploit, exploit, patch)
- cna@vuldb.com (Patch, patch)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-8257?
- CVE-2026-8257 is a low-severity vulnerability in Webassembly Binaryen, classified under Reachable Assertion. CVSS score: 3.3/10. Published 2026-05-11.
- How severe is CVE-2026-8257?
- Low severity. CVSS v3 base score is 3.3 out of 10.