CVE-2026-115393— Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 Cross-Engine Type Confusion
Quick assessment
Affected
bytecodealliance wasmtime
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Wasmtime 在以下版本中存在类型混淆漏洞：24.0.12 之前的版本、25.0.0 至 36.0.13 之前的版本、37.0.0 至 46.0.2 之前的版本，以及 47.0.0 至 47.0.3 之前的版本。该漏洞源于多个 Store API 未能验证对象是否属于该 Store 所关联的 Engine。若嵌入程序通过 、 或 将不同 Engine 之间的对象混用，可能触发 trampoline 签名不匹配，进而导致栈越界写入、垃圾回收（GC）堆内存损坏或程序恐慌（panic）。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| bytecodealliance | wasmtime | < 24.0.12 |
affected |
24.0.12 |
unaffected | ||
25.0.0< 36.0.13 |
affected | ||
36.0.13 |
unaffected | ||
37.0.0< 46.0.2 |
affected | ||
46.0.2 |
unaffected | ||
47.0.0< 47.0.3 |
affected | ||
47.0.3 |
unaffected |
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I. Basic Information for CVE-2026-115393
Vulnerability Information
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Vulnerability Title
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 Cross-Engine Type Confusion
Source: CVE Program / CVE List V5
Vulnerability Description
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bytecodealliance | wasmtime | 0 ~ 24.0.12 | - |
|
II. Public POCs for CVE-2026-115393
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-115393 (2)
Same Patch Batch · bytecodealliance · 2026-10-22 · 15 CVEs total
| CVE-2026-115384 | 9.9 CRITICAL | Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Stack Buffer Overflow |
| CVE-2026-115392 | 7.9 HIGH | Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47 |
| CVE-2026-115388 | 6.2 MEDIUM | Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 Memory Exhaustion |
| CVE-2026-115385 | 6.2 MEDIUM | Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Host Panic via WASIp3 Timestamps |
| CVE-2026-115387 | 6.2 MEDIUM | Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 Host Panic via WAS |
| CVE-2026-115391 | 5.8 MEDIUM | Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 Unbounded Heap Allocation via WASIp |
| CVE-2026-115390 | 5.7 MEDIUM | Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 Fuel Accounting Bypass DoS |
| CVE-2026-115379 | 5.7 MEDIUM | Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via try_call |
| CVE-2026-115382 | 4.8 MEDIUM | Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 wasi:http Zero Timeout Panic DoS |
| CVE-2026-115381 | 4.8 MEDIUM | Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Unbounded Host Mem |
| CVE-2026-115383 | 4.8 MEDIUM | Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via Tag Imports |
| CVE-2026-115380 | 4.0 MEDIUM | Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Fuel Limit Bypass |
| CVE-2026-115386 | 2.6 LOW | Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Memory Disclosure |
| CVE-2026-115389 | 2.3 LOW | Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 Denial of Service |
IV. Related Vulnerabilities
Same product: wasmtime
-
CVE-2026-115392
Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 befor -
CVE-2026-115391
Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 Unbou -
CVE-2026-115390
Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 Fuel -
CVE-2026-115389
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 be -
CVE-2026-115388
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 be
Same vendor: bytecodealliance
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CVE-2026-115392
Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 befor -
CVE-2026-115391
Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 Unbou -
CVE-2026-115390
Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 Fuel -
CVE-2026-115389
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 be -
CVE-2026-115388
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 be
Same weakness: CWE-787
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