CVE-2026-119138

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic After Trap

Published Oct 29, 2026 CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.
Title Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic After Trap
First Time appeared Bytecodealliance
Bytecodealliance wasmtime
Weaknesses CWE-617
CPEs cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
Vendors & Products Bytecodealliance
Bytecodealliance wasmtime
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 29, 2026, 8:13 PM
Reserved
Oct 29, 2026, 2:28 PM
Status
Deferred
Published
Oct 29, 2026, 4:18 PM
Modified
Oct 29, 2026, 9:17 PM
Severity
Moderate
Public date
Oct 29, 2026, 3:58 PM