Dashboard / CVE-2026-118688

CVE-2026-118688

HIGH
MEDIUM Priority: 0.02 BB Relevance: 58/100
Published: 2026-10-28 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: Passive
AT: Present
VC: High
VI: High
VA: Low

Description

wasmtime-wasi in Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 re-appends a trailing slash to rename source paths, causing renameat on macOS and FreeBSD hosts to follow directory symlinks. A guest with sandbox write access can rename a relative symlink such as "up/" to move host directories into its sandbox and read or write them.

Weakness Classification (1)

Affected Software (6)

VendorProductVersion
bytecodealliance wasmtime 0 < 36.0.18
bytecodealliance wasmtime 37.0.0 < 48.0.6
bytecodealliance wasmtime 49.0.0 < 49.0.3
bytecodealliance wasmtime 0 < 36.0.18
bytecodealliance wasmtime 37.0.0 < 48.0.6
bytecodealliance wasmtime 49.0.0 < 49.0.3

References & Advisories (2)

Bug Bounty Relevance

58 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

8.8 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

EPSS — Exploitation Probability

0.24%
Raw Score 0.002420
Percentile 15.4%
Date 2026-10-29

Intelligence Sources

mitre ref →
nvd ref →

External Links