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CVE-2026-119130— Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 HTTP Request Target Smuggling

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 36.0.18 之前版本、37.0.0 至 48.0.6 之前版本，以及 49.0.0 至 49.0.3 之前版本，未验证 中 的值是否为路径。因此，绝对形式的 URL 会被原样写入 HTTP/1.1 请求目标，而连接仍使用被允许的授权（authority）。恶意 Guest（被托管程序）可提供一个绝对 URL，该 URL 可能被该授权下的正向代理或网关接受，从而访问到嵌入者（embedder）过滤策略本应禁止的主机。

CVSS 2.6 · Low
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I. Basic Information for CVE-2026-119130

Vulnerability Information
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Vulnerability Title
Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 HTTP Request Target Smuggling
Source: CVE Program / CVE List V5
Vulnerability Description
Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 does not verify that set-path-with-query values in wasmtime-wasi-http are paths, so absolute-form URLs are written verbatim as the HTTP/1.1 request target while the connection uses the allowed authority. A malicious guest can supply an absolute URL that a forward proxy or gateway at that authority honors, reaching hosts disallowed by embedder filtering policies.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
bytecodealliance wasmtime 0 ~ 36.0.18 -

II. Public POCs for CVE-2026-119130

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III. Intelligence Information for CVE-2026-119130

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Other References for CVE-2026-119130 (2)

Same Patch Batch · bytecodealliance · 2026-10-29 · 14 CVEs total

CVE-2026-119134 6.2 MEDIUM Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 Unbounded Memory G
CVE-2026-119137 5.3 MEDIUM Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Stack Overflow via Type Registry
CVE-2026-119141 5.3 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via realloc
CVE-2026-119131 5.3 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via wasi-http
CVE-2026-119142 4.8 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via call_async Drop
CVE-2026-119138 4.8 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic After Trap
CVE-2026-119143 4.8 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic via Zero-Length Stream Writes
CVE-2026-119136 4.8 MEDIUM Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Async-Entrypoint Enforcement Bypass
CVE-2026-119140 4.8 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via thread.yield
CVE-2026-119132 4.8 MEDIUM Wasmtime 49.0.0 before 49.0.3 Host Panic via Overlapping String Transcode in Fused Adapter
CVE-2026-119139 4.8 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via Func::call
CVE-2026-119135 4.8 MEDIUM Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic via StreamReader Type Mismatc
CVE-2026-119133 2.6 LOW Wasmtime 47.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Misaligned VMContext via Exception

IV. Related Vulnerabilities

Same product: wasmtime
Same vendor: bytecodealliance
Same weakness: CWE-20