CVE-2026-115393

lowpriority · track · 15EPSS 0.001 · 0 %ileUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.09% (0th) EPSS

CVSS 3.8 · low

Is it mine?

4 products

Check your exposure

Who says so?

1 sources

osv

EPSS · scored 2026-10-23

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

Technical severity, 0–10. One row per scoring source.

3.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.8lowCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:Lprimary · disclosure@vulncheck.comexploitability 0.3 · impact 3.4

v3.13.8lowCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:Lsecondary · OSV

v4.01lowCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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:Xsecondary · disclosure@vulncheck.com

v4.00.1lowCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-787US

affected products (4)

Products and version ranges known to be affected.

crates.io wasmtime0.0.0-0 → 24.0.12osvUSpkg:cargo/wasmtime
crates.io wasmtime25.0.0 → 36.0.13osvUSpkg:cargo/wasmtime
crates.io wasmtime37.0.0 → 46.0.2osvUSpkg:cargo/wasmtime
crates.io wasmtime47.0.0 → 47.0.3osvUSpkg:cargo/wasmtime

advisories (1)

Vendor and ecosystem advisories describing this.

RUSTSEC-2026-0222Stores can mix up type indices between engines2026-07-31vendor · osvUS
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hgjw-h833-99q9 For more information see the GitHub-hosted security advisory.

also known as (1)

Other names and identifiers for this entity.

GHSA-hgjw-h833-99q9 osv

sources

Which sources assert this record, and when.

osv NVD CVE.org MITRE

published 2026-10-22modified 2026-10-22

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+16028 more

references (2) nvd

External citations — patches, advisories, analysis.

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