CVE-2026-115383

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 7.8% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/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:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-22.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-22 19:13Z6 DAYS AGO

Last updated

2026-10-22 19:13Z6 DAYS AGO

Reserved

2026-10-22

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-1287Improper Validation of Specified Type of InputBase
• CWE-843Access of Resource Using Incompatible Type ('Type Confusion')Base

Data version

5.2

Document digest

9ae36f6085c3de06372116046969d1522d751c612704845c3ca2c8d842592e0f

• github.comGitHub Security Advisory (GHSA-cfhf-m2cr-62wj)https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-cfhf-m2cr-62wjvendor-advisory
• www.vulncheck.comVulnCheck Advisory: Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via Tag Importshttps://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.4-and-49.0.0-before-49.0.2-gc-heap-corruption-via-tag-importsthird-party-advisory