Vulnerability in Bytecodealliance Wasmtime
CVE-2026-47261
Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all() and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the…
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Bytecodealliance Wasmtime — versions >= 37.0.0, < 44.0.2, >= 25.0.0, < 36.0.10, < 24.0.9
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-47261?
- CVE-2026-47261 is a high-severity vulnerability in Bytecodealliance Wasmtime, classified under Improper Access Control. CVSS score: 7.5/10. Published 2026-06-15.
- How severe is CVE-2026-47261?
- High severity. CVSS v3 base score is 7.5 out of 10.