CVE-2026-115381— Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Unbounded Host Memory Allocation via SinkOutputStream write-zeroes
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 36.0.17 之前的版本、37.0.0 至 48.0.4 之前的版本，以及 49.0.0 至 49.0.2 之前的版本，在 组件的 （当未配置标准输出/标准错误时使用的默认流）的 方法中存在无界内存分配漏洞。恶意的 WebAssembly 客户端可请求进行巨大的零填充写入操作，从而耗尽主机内存并导致拒绝服务（DoS）攻击。
Possible ATT&CK Techniques 1 AI
T1499.001 · OS Exhaustion FloodAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| bytecodealliance | wasmtime | < 36.0.17 |
affected |
36.0.17 |
unaffected | ||
37.0.0< 48.0.4 |
affected | ||
48.0.4 |
unaffected | ||
49.0.0< 49.0.2 |
affected | ||
49.0.2 |
unaffected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-115381
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Unbounded Host Memory Allocation via SinkOutputStream write-zeroes
Source: CVE Program / CVE List V5
Vulnerability Description
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an unbounded memory allocation in the wasmtime-wasi WASIp2 write-zeroes method of SinkOutputStream, the default stream used when stdout/stderr are not configured. A malicious WebAssembly guest can request huge zero-filled writes, exhausting host memory and causing denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bytecodealliance | wasmtime | 0 ~ 36.0.17 | - |
|
II. Public POCs for CVE-2026-115381
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-115381
请登录查看更多情报信息。
Other References for CVE-2026-115381 (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-2026-115383 | 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-2026-115393 | 3.8 LOW | 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 |
| 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-2026-115393
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 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
Same vendor: bytecodealliance
-
CVE-2026-115392
Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 befor -
CVE-2026-115393
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 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
Same weakness: CWE-770
-
CVE-2026-115398
Ghidra before 12.2 Denial of Service via TAR and ZIP File Sy -
CVE-2026-115397
Ghidra before 12.2 Denial of Service via Extension Archive I -
CVE-2026-115395
Ghidra 10.3 before 12.2 Denial of Service via ThemeReader.re -
CVE-2026-115391
Wasmtime 46.0.0 before 46.0.3 and 47.0.0 before 47.0.4 Unbou -
CVE-2026-115389
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 be
V. Comments for CVE-2026-115381
No comments yet