CVE-2026-115380

mediumpriority · track · 16EPSS 0.001 · 2 %ileUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.12% (2nd) EPSS
CVSS 4 · medium
Is it mine?
3 products
Check your exposure
Who says so?
1 sources
osv

EPSS · scored 2026-10-28

Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASI preview 0 poll_oneoff adapter, which performs O(n) host work per subscription without consuming or checking fuel. Malicious guest modules can pass many subscriptions to force long-running host computation that ignores configured fuel limits.

01

cvss

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

5.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.2–5.1

v3.14mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · disclosure@vulncheck.comexploitability 2.5 · impact 1.4
v3.14mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · OSV
v4.05.1mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
v4.01.2lowCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USCWE-770US
04

affected products (3)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • RUSTSEC-2026-0321WASI preview 0 implementation of `poll_oneoff` circumvents fuel consumption2026-10-02vendor · osvUS

    This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j366-h8gg-77pm For more information see the GitHub-hosted security advisory.

06

also known as (1)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

osvNVDCVE.orgMITRE
published 2026-10-22modified 2026-10-26
08

references (2) nvd

External citations — patches, advisories, analysis.

scry

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