Low severity3.3NVD Advisory· Published May 11, 2026· Updated May 21, 2026
CVE-2026-8257
CVE-2026-8257
Description
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 assertion. The attack needs to be approached locally. The exploit is now public and may be used. The patch is named 1251efbc1ea471c1311d2726b2bbe061ff2a291c. It is suggested to install a patch to address this issue.
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Affected products
3(expand)+ 2 more
- (no CPE)
- cpe:2.3:a:webassembly:binaryen:*:*:*:*:*:*:*:*range: <=117
- (no CPE)range: <=117
Patches
Vulnerability mechanics
References
7- github.com/WebAssembly/binaryen/commit/1251efbc1ea471c1311d2726b2bbe061ff2a291cnvdPatch
- github.com/WebAssembly/binaryen/pull/8635nvdMitigationPatch
- github.com/HackC0der/CVE-Repos/blob/main/wasm-binaryen/Assertion_Failure_isRef_wasm_Type_getHeapType_commit_3ef8d19nvdExploit
- github.com/WebAssembly/binaryen/issues/8633nvdExploitIssue TrackingThird Party Advisory
- vuldb.com/submit/809552nvdThird Party AdvisoryVDB Entry
- vuldb.com/vuln/362554nvdThird Party AdvisoryVDB Entry
- vuldb.com/vuln/362554/ctinvdPermissions RequiredVDB Entry
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