CVE-2026-115379

mediumpriority · track · 23EPSS 0.003 · 20 %ileUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (20th) EPSS

CVSS 5.7 · medium

Is it mine?

2 products

Check your exposure

Who says so?

1 sources

osv

EPSS · scored 2026-10-28

Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a missing GC rooting vulnerability that leaves references live across try_call unrooted when compiling Wasm modules. Attackers can supply Wasm modules whose callee triggers garbage collection, leaving stale or dangling references that cause GC heap corruption or incorrect execution.

cvss

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

6.9

010

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

v3.15.7mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hprimary · disclosure@vulncheck.comexploitability 2.1 · impact 3.6

v3.15.7mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · OSV

v4.06.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/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

v4.04.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/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-416USprimaryCWE-416US

affected products (2)

Products and version ranges known to be affected.

crates.io wasmtime47.0.0 → 48.0.4osvUSpkg:cargo/wasmtime
crates.io wasmtime49.0.0 → 49.0.2osvUSpkg:cargo/wasmtime

advisories (1)

Vendor and ecosystem advisories describing this.

RUSTSEC-2026-0326Rooting for GC values live across `try_call` may be missing, causing GC heap corruption2026-10-02vendor · osvUS
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hw8m-q44c-ggrf For more information see the GitHub-hosted security advisory.

also known as (1)

Other names and identifiers for this entity.

GHSA-hw8m-q44c-ggrf 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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+12281 more

references (2) nvd

External citations — patches, advisories, analysis.

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