No exploitation reported

CVE-2026-118688

No exploitation reported by the sources we read.

Published2026-10-28
WeaknessCWE-61

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-10-2819:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-29 09:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-118688?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-118688?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-118688 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 4.08.8read 2026-10-29
NVDCVSS 3.17.9read 2026-10-29
NVDweakness (CWE)CWE-61read 2026-10-29

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L
CVSS 4.0 vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: 2026-10-28
Last Modified: 2026-10-28
NVD status: Deferred

Frequently asked questions

What is CVE-2026-118688?

Is CVE-2026-118688 actively exploited?

Active exploitation of CVE-2026-118688 has not been confirmed.

What is the CVSS score for CVE-2026-118688?

CVE-2026-118688 has a CVSS v3 base score of 7.9 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L.

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