Bytecode Alliance Wasmtime up to 36.0.15/48.0.2/49.0.0 wasmtime-wasi atim/mtim denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k1.65

Summaryinfo

A vulnerability identified as problematic has been detected in Bytecode Alliance Wasmtime up to 36.0.15/48.0.2/49.0.0. Impacted is the function path_filestat_set_times/fd_filestat_set_times/set-times/set-times-at of the component wasmtime-wasi. The manipulation of the argument atim/mtim leads to denial of service. This vulnerability is documented as CVE-2026-115387. The attack needs to be performed locally. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Bytecode Alliance Wasmtime up to 36.0.15/48.0.2/49.0.0. This issue affects the function path_filestat_set_times/fd_filestat_set_times/set-times/set-times-at of the component wasmtime-wasi. The manipulation of the argument atim/mtim with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-115387 since 10/22/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available.

Upgrading to version 36.0.16, 48.0.3 or 49.0.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.2
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Wasmtime 36.0.16/48.0.3/49.0.1

Timelineinfo

10/22/2026 Advisory disclosed
10/22/2026 +0 days CVE reserved
10/22/2026 +0 days VulDB entry created
10/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-115387 (🔒)
GCVE (CVE): GCVE-0-2026-115387
GCVE (VulDB): GCVE-100-425441

Entryinfo

Created: 10/22/2026 22:19
Changes: 10/22/2026 22:19 (78)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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