CVE-2026-115893

LOWCVSS 9.9 · CRITICAL

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

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.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-691

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-10-24: 210-24
Full discourse2 posts
  • ExploitGrid@exploitgrid

    🟠 HIGH PRIORITY (CVSS 9.8-9.9) ├ CVE-2026-115889 · Wasmtime · Cranelift bit-packing causes silent overflow and miscompilation (9.9) ├ CVE-2026-115893 · Wasmtime · Cranelift on aarch64 can jump to the wrong target (9.9)

    1000039
    420 followersView on X
  • ExploitGrid@exploitgrid

    ExploitGrid Daily Digest 🚨 Top CVEs: CVE-2026-115889 (CVSS: 9.9) bytecodealli... CVE-2026-115893 (CVSS: 9.9) bytecodealli... CVE-2026-115931 (CVSS: 9.9) gitroomhq CVE-2026-53942 (CVSS: 9.9) conda CVE-2026-112846 (CVSS: 9.8) ThemeREX Group ..🧵👇

    1000072
    420 followersView on X

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