VulnerabilityAnalyzed
CVE-2026-8257
A vulnerability was detected in WebAssembly Binaryen up to 117.
LOW 1.9EPSS 0.16%
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 1.9 LOWCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.16% probability · 5th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- webassembly/binaryen
- Source
- cna@vuldb.com
References
- https://github.com/HackC0der/CVE-Repos/blob/main/wasm-binaryen/Assertion_Failure_isRef_wasm_Type_getHeapType_commit_3ef8d19Exploit
- https://github.com/WebAssembly/binaryen/Product
- https://github.com/WebAssembly/binaryen/commit/1251efbc1ea471c1311d2726b2bbe061ff2a291cPatch
- https://github.com/WebAssembly/binaryen/issues/8633Exploit, Issue Tracking, Third Party Advisory
- https://github.com/WebAssembly/binaryen/pull/8635Mitigation, Patch
- https://vuldb.com/submit/809552Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/362554Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/362554/ctiPermissions Required, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.