CVE-2026-115387

mediumpriority · track · 25EPSS 0.001 · 1 %ileUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.11% (1st) EPSS

CVSS 6.2 · medium

Is it mine?

3 products

Check your exposure

Who says so?

1 sources

osv

EPSS · scored 2026-10-27

Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 contains a denial of service vulnerability in wasmtime-wasi that allows guest WASI programs to panic the host via overflowing filesystem timestamps. Attackers can pass atim or mtim values whose sub-second field overflows the seconds field to path_filestat_set_times, fd_filestat_set_times, set-times, or set-times-at, crashing the host.

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

v3.16.2mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · disclosure@vulncheck.comexploitability 2.5 · impact 3.6

v3.16.2mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v4.06.9mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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:L/AC:L/AT:N/PR:N/UI:N/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-190USprimaryCWE-190US

affected products (3)

Products and version ranges known to be affected.

crates.io wasmtime-wasi0.0.0-0 → 36.0.16osvUSpkg:cargo/wasmtime-wasi
crates.io wasmtime-wasi37.0.0 → 48.0.3osvUSpkg:cargo/wasmtime-wasi
crates.io wasmtime-wasi49.0.0 → 49.0.1osvUSpkg:cargo/wasmtime-wasi

advisories (1)

Vendor and ecosystem advisories describing this.

RUSTSEC-2026-0314Guest can panic host through filesystem datetime overflow2026-09-24vendor · osvUS
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h For more information see the GitHub-hosted security advisory.

also known as (1)

Other names and identifiers for this entity.

GHSA-j2g9-4prp-pf6h 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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+4648 more

references (2) nvd

External citations — patches, advisories, analysis.

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