November 11, 2026

CVE Watchtower

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CVE-2026-115392NVD

Vulnerability Summary

Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47.0.4 allows a filesystem sandbox escape in wasmtime-wasi because its cap-std dependency mishandles symlinks with trailing slashes on macOS and Linux kernels lacking openat2. A guest with write access to any sandboxed directory can read and write any host-accessible file, and read-only guests may read host files via preexisting symlinks.
Severity Level
HIGH(8.8)
Published Date
Oct 22, 2026
Last Modified
Oct 29, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.24%Probability
Root Weakness (CWE)
CWE-61: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 8.8 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsPresent
Privileges RequiredLow
User InteractionPassive
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)Low
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)Low
CVSS v3.1 Base Metrics — Score 7.9 (HIGH)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • bytecodealliance wasmtime < 24.0.13
  • bytecodealliance wasmtime >= 25.0.0 and < 36.0.14
  • bytecodealliance wasmtime >= 37.0.0 and < 46.0.3
  • bytecodealliance wasmtime >= 47.0.0 and < 47.0.4
Patched Versions
  • bytecodealliance wasmtime 24.0.13
  • bytecodealliance wasmtime 36.0.14
  • bytecodealliance wasmtime 46.0.3
  • bytecodealliance wasmtime 47.0.4
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
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External References