CVE-2026-115382CWE-1284

CVE-2026-115382

Medium · published October 22, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
12.6
In the wild
Unconfirmed
What it is

Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial-of-service vulnerability in its wasi:http implementation that allows guests to panic the host. Guests can specify a zero between-bytes-timeout request option, which is forwarded directly to a Tokio API that panics, crashing the host embedding.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
5.9 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00226 · 12.6th percentile
Weakness
CWE-1284 · Improper Validation of Specified Quantity in Input
Published
2026-10-22T23:17Z
References (2)
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-w4qr-p94g-mjhv · [email protected]https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.4-and-49.0.0-before-49.0.2-wasi-http-zero-timeout-panic-dos · [email protected]
EPSS history
Timeline
  • 24 OCT 03:52Z
    EPSS moved — → 0%
    epss
  • 22 OCT 19:13Z
    Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 wasi:http Zero Timeout Panic DoS
    cvelistv5
  • 22 OCT 19:13Z
    Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 wasi:http Zero Timeout Panic DoS
    cvelistv5