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CVE-2026-8257Disclosure(webassembly / binaryen)

LOWCVSS 5.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

webassembly CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-617

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • binaryen

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
webassembly
Products
binaryen

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-05-11: 2Technical Details · 2026-05-11: 205-11
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    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 comp… https://www.cve.org/CVERecord?id=CVE-2026-8257

    Post summary

    The text reports a new CVE (CVE-2026-8257) detailing a vulnerability in WebAssembly Binaryen's IRBuilder::makeBrOn function, but it contains no PoC, exploitation info, or patches—primarily a disclosure.

    00000137
    57.5K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-8257 Reachable Assertion in WebAssembly Binaryen BrOn Parser Up to Version 117 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-8257

    Post summary

    The text announces CVE-2026-8257, a reachable assertion vulnerability in WebAssembly Binaryen BrOn parser up to version 117, without providing PoC, exploit, patch, or active exploitation details.

    0000053
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appwebassemblybinaryen---

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