CVE-2026-115393 — LOW (3.8)

Vulnerability Description

Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.

CVSS Score

3.8

LOW

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2026-115393?

CVE-2026-115393 is a vulnerability with a CVSS score of 3.8 (LOW). Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong t...

How severe is CVE-2026-115393?

CVE-2026-115393 has been rated LOW with a CVSS base score of 3.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-115393?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.